Again I don't see this happening, its not an option as far as training her goes, and there seems to be alot of characters written to make a lover option make sense (Rio, Sophia, Nadir, Ward, Monica...) however going over Britney again today just made me realize how little an option like that would be for her. She is constantly ignoring you and when she is not she is insulting you and while in some cases that could be written in as the denial of her feelings its makes little sense when combined with her obvious obsession with Stacy. Honestly the only routes I see of her being with the MC is with 1. an MC dominated relationship (i.e. blackmail) 2. Because stacy told her too. Or 3. I'm not in to Femdom but I can see a storyline here where if the MC loves Britney and she hates him then that type of relationship would make sense (that's actually the exact opposite of the relationship I suggested with Sophia where she loves the MC but the MC sees her as annoying so he essentially turns her in to a cuckquean) but both of these are unlikely as they are not written in the phone as an options.