Both Strive games you can breed to your harts content.
Strive for Power even has 1 option to have MC's sister as the first NPC and can breed her and MC children many times over.
Strive Conquest also has breeding and includes breeding MC children.
Both games use a time warp for the children with 2-4 weeks before they grow up.
My Dorm has lots of chances to click on the creampie option with or without pregnancy, but 4 seasons in, no one is visible. One character has morning sickness and you get to have a pregnancy scare and watch her pee on the stick and wait for the results.
Then You get to have a few conversations with (actually) 18-47 year old girls (including close relatives) about impregnation. So it depends on what you want out of your breeding fetish. It says in game there will eventually be scenes with all of your future kids, but that might be years of updates away.
But on its own it is a really good college age harem game. Top notch high quality.
Overview:
Until recently you've lived in a different part of the country with your father. Your parents divorced when you were very little and the family was ripped apart after a fierce custody battle. Your mother took her three daughters home, while your father moved away with you. You haven't seen your family since and any attempts at communication were very much discouraged by your father. But now, everything has changed after his sudden death. During your fathers funeral you were approached by a woman you instantly recognized as your mother. She asked if you would...
You might want to check out Degrees of Lewdity or Lilith's Throne. Both have a ton of customization and fetish-specific content, so there's a good chance you'll find what you're looking for.