I felt "second rate" to XW in the kids' eyes several times. It's not true, though. Keep showing your kids that you love them, no matter what H does or doesn't do. It'll get through to them, even if they're afraid to lose his love by admitting/demonstrating love for you.
His actions will breed uncertainty in them. You can just keep being consistently loving, not bad mouthing him. The kids will notice, in time.
Thanks,
Joe
My sitch More importantly, Light A Million Candles