Update: found out yesterday that my H has had an OW for months. The relationship became a PA at least 10 months ago (people put some REALLY stupid stuff on the internet). He does not know that I know. They are planning a a Vegas wedding, even though he told our D7 a month ago that he was never getting married again. The OW (who truly is a step down from me in MANY ways) has a Pinterest board dedicated to decorating my daughter's bedroom. If she thinks she's going to fill my shoes, she has a serious mental disability.
This woman also has a criminal record. She's a fine, upstanding citizen, clearly.