Exited/too involved mom?

Hi ladies. Myself and my other half have found out we are pregnant!!! I’m around 6-7 weeks. My partner wanted us not to tell family etc because he wanted to enjoy the moment just us. But things didn’t work like that and because he can’t make an appointment he told me to tell my mom so she can come with me. Now here’s my problem. - she was soooo exited which is brilliant. But the first things she said was ‘I’ll be at the scan, and the birth’ (I have two children already and she was there with my first as I was only 16 and didn’t know what I was doing during pregnancy lol). I just feel as though I’m now an adult. I don’t need my moms hand. Yes come to the scans, I wouldn’t deny her of that. But this is me and my partners first child together and it’s a special moment for the both of us. He’s scared she will take over sort of thing which I can totally understand. Has anyone been in a situation similar? Thank you xx