I would like to advise adding a fertilization system, that is, after mating with a monster, the character could get pregnant from it (eggs or a child depends on the monster) I read your post on patreon and what you want to add is this, but I still want to offer a couple of ideas on this topic, for example, you could use your children as friends who will help in something, for example, walking with you to collect things that they find useful and similar, animation of birth would add realism to the process of debuffs can be made so that the character runs slower or does less damage, carries less weight, and also I would like the game to be able to equip the house, for example, rearrange furniture and the like, and also so that monsters can see the character near the house and periodically visit him after that. That's where I ran out of ideas. I hope they will hear me and I will help you in some way. (sorry for the crooked English I write from an online translator)