That way, it doesn't become an issue of whether or not you are trying to ignore him specifically.
What difference does it make if it comes across as ignoring him. I would think that would be good in that he realizes she isn't making him priority #1 anymore. If it doesn't have to do with the kids, I see no reason to have to reply if she doesn't want to reguardless of what he will think of it. Jolt him a little. Don't stop the rest of your text life to make an excuse for not talking to him.
Kevin
Me 36, W 37 M: 08/02/97 D13, D9 1st Bomb 02/08 Reconciled 04/08 2nd Bomb: 09/08 W filed for D 02/04/09 Separated 03/09 D dismissed 06/09/09 Still separated...