Tread, it sounds like the pity you're describing is the contemptuous version, where you kinda look down on them. I used to feel that way when my STBXW would be sneaking around on her phone too. To get me through those moments, I used to imagine she was actually smearing sh*t all over her face
But now what I'm feeling is a little different. It's like the pity you'd feel for a wounded animal.
Me-47,XW-43 S13,S16 M:18 BD:4-23-17 W filed:7-17-17 (5 months of in-house separation hell) W moved out:1-6-18 D granted:2-15-18 Decree signed:3-29-18