Try not to let your H's accusations get to you. He just needs someone to blame for his own inability to deal.
Most of the WAWs do that. They transfer their frustrations, fear, guilt, shame, embarrasment, etc. onto the LBS so they don't seem like the bad guy.
When he texts you just don't respond back. If he calls you and says they are about the kids, call him back and once the kid part is over, say that you were in the middle of something and gotta go.
Just like that.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.