You really have to do what you think is best for your children.

I have no doubt your mother is a great person and I'm sure she has done allot for you but I think you need to say "Mum, I love you but these are my children and I have to make the decison that is best for them" Tell her that you throughly enjoyed CS growing up but you don't think it's right for your children

Then hug her.

Spoiler Alert, click show to read: 

Of course if you were really serious about it you could just become a baptist and help us fight the methodists and the catholics, shifty lot those two.