OKAY... so here we go... a somewhat long post about my findings with inbreeding on the current version 0.7473A...
Debauched Trait - Offspring have 20% chance to ignore the negative impacts of inbreeding.
Abomination Trait - This one was the product of incest (Reduces Stats and Max Lust Capacity)
Sterile Trait - Cannot produce offspring (simple)
With that said, I spent the last 13 hours today breeding the same 2 siblings (600+ offspring) to see how things go. So here's what we have...
The Incestual Parents: (the 2 siblings I breed 48728 billion times x.x)
Here are some examples of the results I got:
As it turns out... EVERY SINGLE OFFSPRING...100% of the time ALWAYS received the Abomination Trait with NONE of the negative stat effects for having it.... and 100% NEVER received the Sterile Trait... and about 95% of the time they received the Debauched Trait from the parents. I found that the Debauched Trait 100% of the time PREVENTS all negative effects from inbreeding with the sole exception of the offspring having to gain the Abomination Trait for trait appearance only (meaning it's only there to say, "yes you inbreed this one".
I began to test other pairings and found that if even 1 parent has the Debauched Trait, the offspring is 100% protected from negative effects (such as lower stats or becoming sterile.) Even if they don't gain the Debauched Trait from the parent.
I found that Sterile Trait only ever occurred randomly (albeit high frequency) when no parent has the Debauched Trait.
Luckily though, since the offspring HAS to have the Abomination Trait and for some reason all further offspring get it if the parent has it, but it has no effect on the offspring as long as it's in fact not a result of inbreeding itself or is paired with one with the Debauched Trait.
Hopefully this is just a current bug... :/