I am so evil, I would totally inform the new "potential" that he was trying to proposition you 2 weeks ago. I would not do this for spite but she should know what's she's signing up for. If they do end up marrying then I give it maybe a year before it disintegrates. He is a broken man and will make for a broken marriage regardless of who he hangs with.
M 10yrs T 13yrs BD #1Oct 2015-PA between WAH and COW BD #2 April 2016-WH resumed PA, she broke it off Jan 2 2017 WH says he wants divorce April '17-Letting go 2018 D busted DD8, DS6, DS3
