Irina is a hot young amateur and if you look at her face as this scene begins you can tell she has no interest in Boris. She might be throwing back drinks with him but that's just because she likes booze. It's all part of his master plan though. He knows that as soon as she gets drunk suddenly her judgment will go out the window and she'll be like putty in his hands. If he suggests that they get naked and screw that will sound like the best idea in the world to her. That's why you're going to see his cock in her pussy before this drunken hardcore scene is over