[NEEDS INPUT] [S] Having baby with Father Winter --> multiple babys for NPC

Added 

It happened to my sim this week, with slight variations.

I left a sim pregnant with Father Winter's baby, and played her adult son's household. Afterwards, on the manage households screen her household clearly had a baby named Isabelle. I used the manage households to move out the ex-boyfriend who broke up with her after catching her with Father Winter, along with one of his sons. This left two spots in the household.

I played another household, and my sims ran into the mother on a community lot and my sim reacted as if he was seeing her go into labor. But she walked off the lot.

When I went back to her household, on the apartment selection screen the picture of her family had the bottle plus one to indicate there was a baby on the lot. But when I entered the lot, baby Isabelle did not exist, and mom was actively in labor. I played through the delivery, and she had twins. I have since left and re-entered that lot at least twice and Holly and Ivy have not disappeared. They are now toddlers. They both have the Father Winter's child trait.

Previous births while playing other households have been perfectly normal, even after Seasons was installed. Only Father Winter's daughter disappeared and was replaced.

Isabelle was born before I installed Get Famous and disappeared afterwards. I have all patches, expansions, and game packs and most of the stuff packs installed.

Forgot to include - when mom was first pregnant there were seven sims on the lot, so only one baby could be born. After the boyfriend and his child moved out, and Isabelle disappeared, there was room for three, but when I played through the labor mom had twins as usual (lot has ley line trait).

Im at the early stages of a Father Winter Glitch (After seeing the glitch I came here to figure out if it was common).

My sim married FW and got pregnant. I left the family to play another, and returned later to see a baby. I noted this baby (Wendy), and left them to it. I did not "make baby" another time, I simply left them as they were, with 1 baby. Played another household and again returned to the FW lot. Today Wendy is still there, she is a toddler and has the FW child trait, but has no relations! No Mum, no Dad (they are there, but not in her genealogy), and now there are twins in the lot (Valeria and Tiana). Twins which I did not create :/ These are both listed as daughters for FW and his wife. I have made both parents adopt Wendy as a care dependant, and left the family of 5 in order to play other households.

I will return later to see how this progresses. Bizarre, but intrigued.

I am having a different Father Winter genealogy problem.  My Sim seduced Father Winter and got pregnant.  He disappeared.  The twins do not have the Father Winter's Baby trait and on their genealogy they have no father. Just their mother and her line. He is nowhere to be found.  He is not even on the mother's contact list, even though their friendship bar was nearly full and the romance line was at about half.  He's just gone.  And the babies didn't receive the trait either.  I'm afraid I don't remember his name.  

I have several Father Winter's Babies-all different Father's.  Just for fun I downloaded a cool Father Winter's house from the Gallery and every time I find a new Father Winter, I move him into the house.  There are five of them now.  Four of them have children in my extended Sim family.  They all show either retired, or they have other menial jobs now.  None of them has ever died of old age, and as soon as I play them, even for a few minutes, they retire and there is a new one the next WinterFest.  I do this so that there is no blood tie for the next generation so they too can have a Father Winter's Baby trait.