caught my boyfriend checking out my sister so i decided to share him

This actually happened about half a year ago with my ex, Nate. He was 24 at the time and I was 19. He’d just come out of this messy-ass breakup because his ex was a total headcase who cheated on him constantly. We met at the gym where we both worked and the chemistry was just instant. It started with heavy flirting during shifts, which led to him driving me home and me giving him head in the parking lot or the back of his truck before I went inside.

He ended up staying at my place a lot that summer. My parents actually loved the guy; they thought he was such a gentleman and a protector because of his build, even though he was just a goof ball on the inside.

The vibe shifted when he finally met my older sister, Elena (she’s 21). She came home one Friday night totally wasted from a club, wearing this tiny, tight red dress that was basically a belt if you ask me. Elena has always been way more blessed in the chest department than I am, and I caught Nate straight-up staring at her tits while she was stumbling around the kitchen flirting with him.

I could tell he was trying to be polite, but then I looked down and saw a massive bulge straining against his joggers. I didn’t even say anything, I just grabbed his hand, hauled him upstairs, and blew him until he absolutely lost it. He finished way harder than usual, just a total mess all over my stomach and face.

Next morning I went down to get coffee the next day and Elena was on the couch looking rough. She looked at me and smirked, saying, "Damn, I definitely heard you guys going at it last night. Nate sounds like he fucks harder than he looks." I just laughed and told her he’s got a huge dick that needs a lot of attention, and I’m a good girlfriend who knows how to drain him.

Later that afternoon, I caught them out on the back deck. They were sharing a smoke and laughing. Elena kept reaching out and touching his tattoos, Nate has these thick, muscular arms with full sleeves, and she’s always had a thing for that "bad boy" look. Watching her hand slide over his bicep actually made me soak my panties. I loved seeing them together.

That night in bed, I decided to poke the bear. I asked him, "So, you think Elena is hot, right?"

He tried to play it cool, saying she was "alright" or "cute," but his face totally gave him away. I took my phone and opened her insta, scrolling her photos. Asking him which one he liked, at first he kept playing it safe, but think he realised i wasn't playing any games. He looked like he wanted to devour her to be honest. I told him straight up: "I want to watch you rail her on our bed while I hide in the closet or just listen from the hallway."

He looked terrified. He literally thought I was setting him up or trying to find an excuse to dump him, so he shut it down immediately. But I knew better.

I kept bringing her up. At first very subtly but later more and more explicitly. So much so that i even told him to close his eyes and pretend I was her while we fucked.

A few weeks later, my parents went away for a long weekend, leaving me, Nate, and Elena alone at the house. I had a doctor’s appointment one afternoon when I knew they’d both be home. Before I left, I whispered to Elena that Nate was mentioning her and that she should keep flirting with him while I was gone.

When I got back, she gave me the play by play.

Nate was in the shower.

Elena "accidentally" walked in to grab a towel, wearing nothing but some tiny lace undies and a see through white tank top (no bra, obviously).

She told him she’d been "sneaking peeks" at him and that I was lucky to have such a well-endowed guy.

As she walked out, she slapped his ass and he apparently let out this low groan, just watching her walk away, swinging her ass side to side in her lace panties.

When I walked into the living room, the tension was so thick you could cut it with a knife. Nate looked like he was about to explode.

That night, I led him to the bedroom but "forgot" to click the door shut. I wanted her to hear everything. I made him bend me over the edge of the bed and he fucked me harder than he ever had in his life. He was feral, totally losing control. For the first time ever, he didn't pull out, he just stayed deep inside me and filled me up completely. I fucking liked this version of him.

The next morning, Elena pulled me aside. She admitted she didn't just listen, but that she actually crept up to the door and watched through the crack. She saw him pounding me from behind and said she’d never seen anything so hot.

It was officially on. Part two coming soon...