What does not make sense is, that on every lewd game someone asks for pregnancy. ffs. You do not want pregnancy, you want belly inflation. A game that will last like 20 ingame days, a so called pregnancy will not change a single thing. The characters most likely will not even notice their period being late.
Speaking of periods, curious how none of the girls is on her period. Like, ever. You could ascribe that to the usual break from reality for porn (just like anal is always possible without preparation) ... or you could ... you know ... think about what happens irl when women are on birth control. (Hint, if they are on every day prescription, they do not have their period at all for months).
And just because we see a thing not happening or being talked about, does not mean, it does not happen. We do not see them using the toilet either. Or brushing their teeth.
Also, getting impregnated is its own fetish. You cannot infer it from being a slut,girlfriend,dominatrix or being obsessed.