Fiction Story: There was only one thing to draw him to her, OK, maybe because she was blond, cute, looked like a model and acted like a slave, had something to do with it. He really just wanted to help her.
Frank, Alex and Gina join in at Ch. 2, Boris, Katya et. al. are now 'friends' in Ch. 3.
Now there is a 'real' team behind him, now the Evans and Vincent 'thing' can be 'taken care of'. Even more as everyone gets into the act, as a team, eventually.