I'm the jealous type, never thought about any gal I liked being with another guy, I got pissed off thinking about it.
Years ago, I was 21, had a fuck buddy gal that would visit, was good for me, no dates just sex at my place. I knew she had a boyfriend.
It went one of two ways, she'd call about 6, if I was home she'd come over with pizza, we'd eat, watch TV, laugh then have sex, was good.
Or she'd call about 10-11, she'd stop by and we'd have sex, all good. For a late night visit she was always horny, ready and wet. One night we'd fucked one round, she's talking about her ass hole boyfriend as she did sometimes. I suddenly put it all together, she was out with him then stopped at my place after. I'd been getting his seconds. I was friggin pissed off and she knew it. She told me she liked what we had going, sex only, and didn't want to stop. I'm thinking no way. She was all over me, sucked me hard and we fucked again. I quickly got over being 2nd for the night.
I guess I was getting cucked but I knew if when she called late, she was calling from his place and phone, she was ready to fuck me till I was beat. Once I understood the whole thing we'd talk about it. She liked telling me how many times they fucked, positions, what she liked, he liked. It was hot.
She wasn't very pretty but had a rock solid body. Fun times.