My girlfriend asked me to have sex with her and her cousin so she could show off how good I am at it

My girlfriend is a sweet girl who usually competes with her artist girlfriend in the middle of one of their typical fights, my girlfriend told her blond cousin that I was the best dick and that no one fucked like me. Her cousin took that moment in her favor and without hesitating for a second, she asked if it was true. My girlfriend didn’t understand at first, but then agreed and invited me to her house to demonstrate to her rich blond cousin how I’m able to make her pussy have multiple orgasms without penetrating her with my dick. The bitch is sucking my dick when she then places herself on the bed to give her a delicious pussy licking, my girlfriend helps me giving me a pussy lick too so her coochie is wet enough and I start inserting my big dick into her coochie, over and over while she focuses on stimulating her cousin’s clitoris with the help of her tongue and then with the tip of two of her fingers. The bitch never stops moaning as she feels my girlfriend and I work together to make her have an exciting orgasm.