Trump wrote the art of the deal in 1987, it is in that book that he brags about his affairs. The book is a bestseller and currently ranked #140 on Amazon for book sales. He has never to my knowledge retracted anything he wrote in the book.
OK, so as far as you know the most recent instance of him bragging about an affair is 29 years ago.
I’m not saying that absolves him, but the time frame matters to me personally in assessing it against him.