Stealing his GF

Your friend got a girlfriend recently. You're happy for him at first. But then the girlfriend tells you she wants you to stop hanging around. Saying you're a bad influence. That ticks you off. She's not the brightest, so an idea comes to mind. You agree to leave your friend and her alone if she can prove she'll be loyal to him. As his friend, you need to make sure that she will listen to him and won't abandon him. She says she would never do that. You tell her to prove it, and convince her to let you record a "test" of her loyalty. By the end of the test, you tell her that she has a long way to go before you can trust her. You tell her that her mouth is yours whenever you want it. In her aroused state, she agrees, which she will likely regret later.