I've had the same happen to me, i leave my villages running on 1/2 time & in one of my villages a mother dropped one of her babies & got another straight away, i had to wait to see who the father was, none of them set on parenting. Another time one of my village men (a doctor) got 11 women pregnant all around the same time (lucky he was not related to them) i have posted pics of it on one of the threads here. I think if you use particular men they seem to get the knack for it & go off the rails a bit. LOL.