SS Storm -- I can somewhat relate to you..
I am 28yrs old & my mother is STILL trying to control my life.. Well she was until recently..
My most recent surprise has really made me stand up for myself & my little family, my mother has being unsupportive from the moment I told her (and she wonders why it took me 7wks to tell her! - i was 13wks at the time).. She has only just recently given up on trying to talk me into a termination!

Just think about it like I have, if she doesn't come around, it will be sad indeed, but she is the one who will miss out..
Best of luck with telling your Dad
And it's fantastic to read you have such wonderful support from DF's mum..