No, I couldn't.
In fact, I have played this scenario in my head a few times. DH and I have had many ups and downs. About 17 years ago he had what I call an emotional affair. I didn't know it back then, but I know it now from educating myself on here. He went away on a business trip and stayed in contact with a work colleague over there until I found out about it and hit the f*cking roof. We broke up for about 6 weeks, still in the same house.
My crazy mind often wanders to perhaps it was an affair and what if one day some child comes looking for him.
What I do know is that I will never put up with that shit again. He humiliated me once, he won't be allowed to do it again. If I ever hear about an affair, or if I ever sniff an emotional affair again he'll be out on his arse. Never mind a love child. Definitely NOT.
He has got everyone running around after him hasn't he. Two women with his babies/ children fighting over him. His mum and his aunty getting involved and poor, poor him having to go to the doctor as it is all too much for him. What a virile man. I bet he thinks he has a golden cock.
What your ex has done is split from you, shagged around thinking whay hey, I'm single, without a thought or without grief for his 9-year marriage and his 2 DC. How many other women did he shag during these 3 months? Just the one love child?
I would send him and his golden cock packing.