another question I saw that Eric-Maki-Anya are half-siblings and Laura is Eric's stepmother. Is it just to avoid having problems with Patreon in the future?
For sure. I actually thought that the relation was described as sister + mom at the beginning (don't know if this has changed), but if this is still the case he should change it ASAP. Patreon will throw him out without thinking twice, and there's been a bunch of developers in trouble lately.
There can always be an incest patch on F95 or his Discord for example, but he should make it 100% clear in the writing that there is no blood-relation in the game he's distributing on Patreon itself.