If OW calls, it will not do you any good to "cuss" her out. Like NY said, you very likely could be doing more damage to your R than to OW. Is that something you want to risk? Things are already bad enough, right? Why make it any worse?
I understand your feelings of "invasion". When I made my H make the "it's over" call to OW, he was about to use our house phone, but I quickly said, "Don't you DARE call her from my house! Use your cell!" With everyone having caller ID these days, I did not want OW knowing our home number.
I know we're not supposed to have R talks either, but if you really feel that this is an intrusion (it seems clear that you do), then IMO, you should GENTLY and CALMLY express your feelings about it to your H. Let him know how uncomfortable the sitch is for you, and how you'd appreciate it very much if OW didn't call the home number again.
That's just my 2 cents.
JV
Valerie
"I can't change the direction of the wind, but I can adjust my sails to always reach my destination." ~ author unknown