When does it cross the line for an ex to stay in touch with your family

Ayanna
My ex and my grandmother are very close. When we first parted ways after 3 years I advised him due to the loss of his own gram I had no issue with him remaming in contact with my grandma and now I regret saying that. It started off with conversations about me. I kindly asked him to keep me out of the conversations and I kindly asked her to respect my choice to move on and to not discuss me with him. Months later I've moved on and I'm very happy in my new relationship however today I find out my ex went to visit my gram and he showed up with his new girlfriend and her daughter. I feel 3000 percent disrespected and I feel like as a woman I wouldn't dare go with my man to visit his exes family. Like for one why are they relevant to you and for 2 how uncomfortable would it be to see pictures of the previous woman all over the house and know that her grandma is probably judging me. Next i felt disrespected even more because I would never go to his parents home with my man and why would he feel that its okay. Then a part of me wonders if he did it so that it would get back to me. I'm so pissed what are your thoughts?