I've never posted to you before, but I have lots of experience with the OW calling, texting, contacting and being an all around bunny boiler. If the phones your sons have are ones that you purchased so you could get ahold of them when they are with their dad, then whos to stop you from changing the number on them and just simply turning them off when the boys are at home with you? It seems that their dad and his psycho-tart don't need to have access to the phones because when they are in use, the boys are with them. Just a thought. As far as her texting you or calling you, just keep them all and lock them so you can avoid deleting them. Not sure if it would be worth it, but you might want to get a 2nd phone as well and just keep the one you have now to use only w/XH.
She has NO reason to be calling, texting or talking to your sons for any reason. That your XH is allowing this just shows that he is mean-spirited and a weakling because he is allowing her to hurt his kids. Sad.
M:39 H:39 K:S14;D8 T:22yr M:15yrs S:12/28/07 EA/PA 3/14/08 OW preg 11/17/08 born 12/12/08 his ~~~~~~~ Never allow someone to be your priority while allowing yourself to be their option