User blog comment:Negiiz/What DLC would you like for Skyrim?/@comment-4660954-20120420010859/@comment-28584497-20120423152854

It wouldn't be that difficult.

They'd simply have to build basic "mix" races of each different race combination (ie Argonian + Khajiit, Breton + Imperial, Nord + Orc, etc; make basic character templates based on those), check what race the parents are, and then run a 50% chance of either parent's individual features being implemented into that child (pseudo-random number generator would work fine in this case, with 1 or 2 being the only possible results and each representing either the player or the spouse), which would be of the mixed race.