There will be more characters, and people can commissions for new characters/scenes with current characters too.
There are gameovers where the player is talked about giving birth, but later for those who want a bit more. Jar and Sep will unlock the ability to get preggers with someone and give birth. For those who want it, and those who don't won't ever see it.
It won't be highly detailed or anything. Just some bonus scenes for getting knocked up and not ending your adventure.