Thank you. I don't think she does.
The babies just receive your wife/husband's eye and hair color. This was free DLC in Japan so I guess it's maybe expecting too much for her to get her own portrait with ears.
Sadly, a major part of the problem with marriage in these games is that it generally happens towards the end of the game. I'm pretty much done and I'll have to skip ahead and not take care of my farm to see her grow into her kid stage.