My understanding is that the fatherhood of several royals is a bit sus.....Prince Edward, as mentioned Harry, one of Princess Anne's kids also.....and of course down the decades there have been many, many others. But of course none of them would admit it. But it also happens to us commoners too doesn't it.
Just that we can do it more privately than they can. And mistresses have abounded also, Philip is believed to have had one, and we all know about Camilla. Anne's first husband is said to have been very fond of the ladies too.....and so the list goes on......!!! At least with me, both my first and second husbands name has been.... Brian. LOL.