My two werewolf sims just had a baby, they're both fair skinned, the baby is dark skinned (and stayed dark skinned when I aged him up). Anyone else have this issue?
Its a known issue for all sims. Once the kid is aged up it should have the skintones of the parents (usually, sometimes toddlers have skintone glitches, but I think that's just the genetic system surprise mechanic at play).