Ex Girlfriends Little Sister

My new roommate was out of town and mentioned his gf would stop by to drop off some items. When I opened the door my jaw dropped, it was my ex girlfriend’s little sister! There was immediate affection, and she was fucking hot. Athletic skinny build with a matching pink summer yoga set. I gave her a hug and ran my hand down her waist. She smelled amazing, and was sweet as I remember. I insisted we sit down to catch up. I used to tease her when she was younger. She was crossing her legs and twirling her hair, her nipples started poking through her top. I wanted to take a pic of us but I didn’t have my phone so she lent me hers. I pulled her close and she rested her hand on my thigh. Truthfully I was rock hard having her so close. After I sent the pictures to my number, I teased sending them to her sister to make her jealous. For context, I used to fuck her older sister like crazy but decided to break it off when she wanted to have kids. We had sex in her parents home even when everyone was home at times. She lunged for the phone and fell over my thighs. When she pressed up she snagged my crotch, I jolted but ran my free hand down her back. To my surprise she decided to straddle me. Her crotch was soaked, so I knew she was turned on. While she attempted to grab the phone, unable to reach, my free hand was already grabbing her ass as she rocked back and forth. Don’t you dare send that or I’ll squeeze your cock! Her hand made her way to my erection but it only stiffened. Or what? I squeezed her ass hard and she did a little yelp and bounce. You know, I know how it looks it’s not new to me! No way, apparently her sister told everything about our relationship and shared pictures of our intimate life. Go ahead I insisted, I tossed her over and lowered my shorts. She crawled back hoping to pain me but when she saw I wasn’t hurting in her attempt she began to gnaw at it with her teeth. Before I knew it, I was shoving half of my cock down her throat. She was enjoying herself from pleasing alone. I pulled her shorts down and fingered her. A few minutes later I was bare backing her pussy on the couch. I was able to snap a few pictures and send them to my phone before tossing it across the room. I hadn’t had action in over a month, she cancelled her plans, stayed over the night. We took a break from fucking to eat and she texted her bf she had dropped off the items. She called her sister right after and gave me head before sleeping. The next morning we fucked in the shower, went shopping, and fucked in the car before heading home. My roommate hasn’t found out, nor her sister.