Your mom sounds exactly like mine, asking me at teenager age 'look we didnt baptize you, but you can choose any religion you want and we are okay with it'
Its a way of thinking we can only be proud of to have this as a rolemodel. And she is right, what you worry about, you guys will all get by. Its a matter of putting this in perspective
im sure she got flack for it too... but that's what makes them awesome, right?