Not sure how often you check your email, but it ight not be a good idea to block her number. I understand why you would want to, but I would want to have that line of communication open in case there was a serious emergency. If S was seriously injured and in the hospital you would probably want to know immediately. Maybe just tell her to use email unless it is an extreme emergency...
I unblock it for a moment a few times a day, so that way any incoming messages still get received. It still gets the blocked messages, and you see them when you unblock. I just dont get alerted immediately and thrown off by any random petty messages from her. Also if it were a true emergency she knows my Office line #, or could have MIL reach out. I told her to use email last week and she agreed, then proceeded to text me several times.
M: 35, EX-W: 3, S:4 All Divorce Proceedings Complete - Oct 18 ----------------------------------------------------- 2nd EX - Was Engaged - Diagnosed BPD 2 Major breakups. 2 Rebounds