Okay guys I need some serious input.

I’m engaged and my fiancé and I are in our 20s, we live separately until we get married. Soooo last night my fiancé and I were at my house it was 10pm and the movie was just about done, his mom texts him “where are you” and he responds with “con mi baby” (with my baby) and she replies “que no te yenaste con ayer” ( didn’t you have enough yesterday). Keep in mind I don’t see him Monday-Thursday just the weekend. So to me it’s like we’re grown adults, we’re engaged, we’ve been together almost 10 years, we’re no strangers. This woman always has something to say like he’s still a child. Like whenever he’s with me and she knows because he’ll mention it before he heads out that he’ll be with me, she’ll start calling and texting him around 9 telling him he should come home cus he works. I’ve asked him to please tell her that I’m his future wife not a new gf, so that I deserve my place. She always has smart ass remarks, pls help :( what else is there to do