I get the feeling that this game was supposed to be heavy on the preggo fetish from the start, but people got more excited about some other tags. There are obviously going to be harem vibes, when most scenes are centered around a single MC, but people get personally offended, if this doesn't play out the exact same way as the hundreds of other games with the harem tag.
The dev was like: "Hey guys, belly bumps are pretty hot, right?!" And didn't expect the response to be: "HOW DARE YOU SULLY THE SANCTITY OF THE HAREM TAG!!! YOUR GAME IS TURNING THE FREAKING FROGS GAY!!!"
I've seen this before a few times now, so I'm getting used to it, but, if you take a step back, it's actually a little disturbing how some people make the tags on a porn forum a personal issue.