I only saw it because I wanted to know what Mia was looking at and craned my head. Until then, my view of my groin was obstructed by Ava’s head. Looking back at Mia, her expression was free of judgment. She was simply studying Ava, who was studying my hard dick producing a tent in my pants. The worry about what kind of conclusion Mia might draw regarding Ava’s relationship with me quickly killed the mood, and my erection was completely gone before Ava could show any incriminating behavior.
Mia did not comment on it in any way, though two nights later, we found ourselves in a similar situation. This time, however, Mia had purposefully provoked it by cautiously rubbing herself against me, while also kissing and licking my neck and ear. As soon as she noticed the effect it had on me, she stopped everything and watched my sister instead.
Ava had, again, completely forgotten about the TV. The tent in my sweatpants was apparently a lot more interesting than the show we were watching before. She didn’t do anything too telling, but one of her hands that was lying on my lower stomach was now slowly wandering downwards in the most minute increments before she caught herself.
From that day on, and to my dismay, Ava and Mia started spending a lot more time together.
Over the following few days, whenever Mia was in my apartment, they would withdraw into Ava’s and Claire’s room for “Girl’s Talk”. On occasion, when we were spending time together and I entered the room, they were caught up in a whispered conversation that abruptly stopped as soon as they noticed me. I have to admit, that kinda pissed me off, since I would feel myself being thrown back to my time in the family home as a fourteen year old.
The whole situation escalated another few days later, when we were all in bed again.
I was already dozing off when I suddenly felt Mia’s hand slip into my pants and wrap her fingers around my dick. In my already half sleeping mind, I simply enjoyed the feeling of her delicate fingers probing my cock, pressing her thumb on different parts of my shaft as if exploring it, before sliding further down to grab my balls and gently stroking them. She had me hard in no time.
When she pulled her hand out of my pants again and licked her palm, I finally woke up enough to remember that we weren’t alone. I looked to my side and could see that Ava was lying on her side with her back to us, but that back was firmly pressed into my side. By the time I looked back at Mia to tell her to stop, her hand had already found its way back into my pants.
When I opened my mouth, she simply cupped it with her other hand to stop me from speaking, and smiled sweetly at me. Her intention was clear now. She was doing that on purpose. She wanted to play around with Ava next to us.
The weeks of no release, coupled with the naughtiness of the situation and Mia’s encouragement, won against my reluctance to play along. Mia had positioned her mouth close to my ear, so I could hear and feel her hot lustful breath, only interrupted whenever she kissed the side of my neck. Simultaneously she started jerking my shaft in painfully slow and long strokes.
After about a minute of that, she used the hand cupping my mouth to turn my head away from Ava and towards herself, removed it from my mouth, and shut me up with a passionate kiss instead. Her tongue invaded my mouth and massaged my own, as her hand kept rubbing along my dick at a steady pace. When I opened my eyes, I could see that she was again attentively watching Ava for any reaction to what we were doing, as she slowly and carefully pushed down the waistband of my sweatpants and exposed my hard cock to the air.
Mia, now less careful with what she was doing, spat in her hand for extra lubrication before rubbing it all over the tip of my cock. I unsuccessfully suppressed a small jerk that traveled through my legs, and felt Ava now press her butt into my hip. That was it. She was awake and surely knew what we were doing literally behind her back.
To my surprise, though, instead of making herself known, I could see her thighs rubbing together while one of her hands seemed to make the journey towards her nether regions. Looking at Mia, I saw a mischievous grin appear on her face as her eyes sparkled.
Watching Ava’s reaction to what we were doing, Mia was now resuming my handjob with less inhibition. For the following few minutes, she didn’t care about making noises anymore, though she didn’t go so fast it would cause my body or the mattress to move too much and force Ava to acknowledge what was happening. Then she placed her mouth close to my ear again and spoke in a whisper that, in the quiet room, was surely loud enough for Ava to hear as well.
“Come for me.” and she increased the speed of her jerking hand significantly. “Don’t you want to shoot all over my hand, Stud? Right next to your oblivious sister? Come for me, Tim. Come right next to her. Don’t hold back. I’ll catch it all. Just come!”
And with that, she leaned down, wrapped her lips around my tip, and jerked me off into her mouth. I came in seconds and felt my body tense up as I emptied myself into her waiting mouth. And, apparently, Ava came as well! While I shot rope after rope, my eyes jumped between the sight of Mia’s lips around my cock, and the sight of my sister rubbing herself right next to me. Suddenly, Ava’s body slightly trembled and her legs stretched out. Mia continued sucking on my tip and slowly stroking my cock until Ava’s body relaxed. Only then did Mia wordlessly pull my pants up and snuggle back against my side.
Within no time, I could hear the both of them breath their slow and deep breaths, telling me they were asleep. I, on the other hand, was wide awake and horrified.
Mia had just jerked me off, even used her mouth on me, right next to my sister. She knew Ava had started masturbating halfway through, and climaxed around the same time I did. Mia had deliberately done this. But for what reason? What was she trying to achieve!? And what would happen now? I only saw one possible course of action: Deny any knowledge of what Ava had just done! So, the very next day, as soon as the opportunity arose in the morning, I turned to Mia.
“What the fuck was that last night!?” I asked, trying to sound as pissed as possible.
“Why? You didn’t enjoy me sucking the cum out of you?” she simply grinned.
“Not with my fucking sister right next to us! What if she woke up!?”
She suddenly looked at me with pity in her eyes. Like I was a little child that didn’t understand something obvious.
“Muffin, she was awake.” she smiled. “Didn’t you notice that?”
“No.” I stood by my decision to keep denying everything.
“She did even more than being awake. She came just seconds after you did.”
Interestingly, her voice did not sound like she was building up to some kind of blackmail. She simply informed me of a fact.
“No, she didn’t.” I insisted, causing her to sigh.
“Look. I’m pretty sure she likes you, Tim.” she said in a soft tone.
“Likes me? You mean, like,...”
“Yeah. I meant it as in being attracted to you. And not just physically, but emotionally.”
“You say that like it’s the most normal thing ever.” I said, after realizing that she was sounding more supportive than condemning.
“Yeah, well, I can’t really blame her.” she sighed again. “I talked to her a lot over the past few weeks. And I have to say, I kinda get it. For me, you took a bullet in a heated split-second decision. But for her, you actually risked your life to protect her after having enough time to think about it, knowing you’d be risking your life. She feels safe with you around.”
“So what!?” I called out, all pretense of my disapproval gone from my voice and demeanor. That little piece of information Mia had just given me was genuinely shocking. I knew Ava wanted to have sex, but I didn’t know about her developing those kinds of feelings for me! “Do you feel safe around Jack? Or your Dad? Does that make you attracted to them as well?” I asked, not believing that she would be actually okay with this. To my astonishment, she simply shrugged her shoulders.