I saw twin spotted fawns here in Ohio one time in late November about 5 years ago.

I've seen spotted fawns in late fall. It's rare and the fawn likely won't survive the winter.

I just got this one on my trailcam. Latest I have ever seen one spotted like this. That dat was 11/15 I believe on the pic, the year says 2012 but I just forgot to correct when I changed the batteries..

Ruts usually around thanksgiving

I won't say something can't happen. But in parts of the country where the rut is in the fall, does normally cannot breed at a time that would yield a spotted fawn on 11/29. But, you saw what you saw. The yearling doe or the mature doe may have been the mother. It was obvioulsy a very late conception.

And for the record, bucks are physically capable of breeding year-round. Antlers have nothing to do with it.