I might be wrong but I see essentially 3 main paths:
1. NTR/Cuckold -> her boss and maybe other friends of his will do with Lara whatever they want.
2. Cuckqueen -> pretty much adding women to their relationship (FFM 3somes, obviously including the one with the babysitter).
3. Swinging/Xsomes -> pretty much adding men (and women in the swinging subpath) to their relationship (to summarize, FMM 3somes and orgies).
From the MC's perspective that means:
1. He might enjoy watching Lara being banged by other men if he eventually finds out (we'll see about that, because we don't know if he's going to find out and, in case he does, we don't know how he will react).
2. He'll be a lucky guy (who doesn't want to add more hot chicks to their bed?
).
3. He may have mixed feelings again when other guys fuck her (such as the Yoga instructor, who's going to bang her sooner or later).
But in general, he'll have plenty of sex, that's for sure.
Regards