Without judging or anything (This is a porn site!) I would like to ask you if you have any rationale for your particular fetish. I notice there is very often pregnant CG variants in hentai, and I always have to skip them or delete them, to me the woman becomes unattractive, I mean, she is literally gaining weight.
Is it related to the preference of cumming inside a woman, or maybe a preference for heavyset ones?
Just weighing in my 0.02$
Fantasy wise I think it is great power play to knock up a married woman with or without her husband knowing, maybe even force her into it a bit. Since all the girls in this game are single it is not really an option so for this game I can live without it.
And yes they gain weight but if they keep in shape it is mostly bigger breast and a baby belly bump which I like.
I can't post links yet but you should google image search 'pregnant sarah stage'
The black lingerie selfie is a 9 month baby bump. She off course is an extreme case being a fitness addict.
Reality wise I could not do it though, I would have to raise my own children. In the fantasy you basically abandon your own blood. And I have many things more fantasy wise that I like that I will never do in real life like forced sex (again the power play basically).
But I say to each his own as long as its between consenting adults. Me for instance I have never understood a foot fetish.