Dink - Do you kids know about the affair and/or potential divorce? They're older (25, 27, & 30) plus a grandkid so not clear if they're living with you and W or moved out?
SteveLW gives great advice. Read his post above a couple times.
Me:39 Ex-W:37 M:7 T: 9 S:6 D:3 BD/IHS/Confirm EA/PA: Feb '20 OM1 affair ends: May '20 W/OM2 & moves out: June-July '20 W files for D: Jul20 OM2 confirmed: 9/2020 Divorced: May '21