My mom said "Its a commandment to go to SC." Is this true? If it is god can kiss my butt. If this pre existence BS is true, I don't think I'd be valiant to god if he said it
So ask her to prove it. Make her show you the commandment that was backed by prophetic revelation then edited, printed and sent to the masses. Otherwise "Mom" you are making stuff up.
Attending meetings is only an "implied" commandment and only to keep straying minds like yours on the straight and narrow.
Check the D&C, cuz I think this "commandment" is in there. One of the primary duties of a baptized member is to take the sacrament weekly at the SacMtg.