This makes me wish I hadn’t already played through the LDC content already. Now I might have to make a new character in order to see what’s coming down the pipe for him and the Hopper.
For now, all this means is that in that post-Hopper fight, you can get impregnated by Him and the Hopper if you're a bimbo/amazon with two or three vaginas, or you can get impregnated by the Hopper if you Ride her.
They'll reappear in the future and then their pregnancy bits will kick right back in.