Sorry about the delay. I didn't come up with any errors so far (Which is a good thing of course) , so I'm going to just focus on other areas. But that means it's just suggestions for content or polishing.
1. Some people do not seem to object or even respond (like Lily) to you declining to use protection. Example:
"Please use a condom."
"No, I'm not going to."
*scene proceeds without her even telling to you to be careful and pull out or try to convince you otherwise.*
Sometimes people do mention that and for some people it doesn't. They don't even acknowledge it with an "hmm... okay" or anything like that. When I checked the code in the weekend it did mention that the requests/responses change depending on love/obedience, but I don't think it was supposed to literally skip to the next scene right away.
2. Having likes/dislikes factor in stronger how they respond would be nice. i.e. offering a condom that's intentionally sabotaged because she wants to get pregnant or something like that would be nice. It would be great if you could change people's behavior depending on serums, too. I.e. in heat serums or the likes.
3. The Lab Rats 2 mod pack features an optional NTR toggle that lets you notice a scene where you notice them have sex with strangers. I don't think you included the option of them getting pregnant from that as well. I assume it would be quite hard because you'd have to rework how the pregnancy reactions and such are. (i.e. she gets pregnant from someone else and then tells you she's pregnant because you haven't been using condoms... even though you perhaps never had sex with her in the first place), or NPC's with relations with other people without the NTR part.
4. Perhaps integrate pregnancy talks with your mother when she asks for your weekly money contribution for (potential) favors and perhaps add in a kink here and there for the "I'll pay you double if you don't take birth control this week and let me have sex with you once." kind of talks?
5. Same goes for Lily. She has certain events where she asks if she can test your serums for money. You could either add the #2 suggestion for these kinds of events. Or even try and be creative and have her take a "serum" vaginally
6. As for #2 and #5, perhaps have serums that break birth control. There are also literal Fertility serums but they do something very different than what you'd expect from such a name.
Just a few things here.