You as a player can choose to avoid it, yeah. The game will even react to it when you do it the first time, and will assume you don't want to impregnate her at all if you do it again (which will happen in ch6). In ch5
Yeah there's going to be a ton of SPH and humiliation in general. She's slowly ramping up to it (though I think she does a good job for a newbie

), but I'm currently writing a 1,000 line humiliation-specific scene for 5.5. (optional) Chastity is also planned but it'll be a bit, both for the femme MC and male MC.