My ex wants to go to my grandmas funeral yet she has ignored me and now calls to find out the arrangements..?

I have tried to be civil lately and though it was a ruff breakup, and my ex has refused to talk to me, until she found out by me telling her mom, ( we still talk). Then she calls and asks to go, even though most my family would probably prefer her to not go, (bad feelings), and my Grandma wanted only a private funeral, yet my mom knows I still have feelings for this ex. Should I contact her and let her know how I feel and give her the info for the funeral though anyhow? I know this is not about me, and I don't mean to make it sound that way, but what would you do? I wanna be the bigger person that she was not to me when her grandmom ped away, and at least I cared enough where I didn't even have to contact this ex to get the arrangements. IDk,,, I think I answered my own question, but just want others input....Thanks