No reason to end; if you can get along with your husband all right, the kids need their grandparents, etc. so it's normal to continue the relationship if both parties wish?

I'm going this Saturday night to my husband's ex-wife's house and bringing presents for her mother, sister and her boyfriend and sister's boyfriend! We still get together for holidays and other times of year (I had the mother's day party this past summer :-) Give your mother-in-law a call or ask your husband to ask her to call you, whatever, and the two of you go out together and "decide" how to move forward?