Glad you like it :3
Sarah is not a pro athlete, she's the step mom, maybe I'm confused here though. I think she'll grow too at some point, no reason not to. Next update is mostly visuals for past scenes though, adding new scenes in the one after that so no fucking her yet >:3
Pregnant? In theory yes, but not sure yet if that's a thing I'll do in the game at this point in time, too early (also if I were to do that I'd have to decide between a pregnancy system where unprotected sex has a chance to get a girl pregnant (also means we need condom item in shop) or making it a story path with a girl, leaning more towards the former since it means you can easily do it with any girl).
Contacts of teachers will come after they get more events, for example you get Angela's phone number after you do your first training session (not yet finished) with her at the gym.
ETA of next update? No idea, whatever I say is always wrong, but I'm working on it, replaced all of the sprites in the game so far, added a bunch of new ones. Currently working on adding NPCs like in gta 5 or witcher 3 to every location so the world feels less lonely (and so I can have some friends ;-;), after that it's custom visuals (like rachel smothering player with her tits), some sounds and then I'd say that's about it.