How do you know they aren't hiding something? Not saying the psychic bitch is right, but still. Maybe one of your siblings is pregnant, got someone pregnant, failing a class, maybe depressed, etc. You never know.

I am assuming you are underage if you can still be grounded, so find whatever the equivalent of child protective services is where you live and let them know what your mother is doing to you.

all psychics are useless. One big fraud

Bribe the psychic to say something advantageous. Try something like "Your should let your children grow up by allowing them to host a party" or "Your daughter needs a car to practice good driving habits"

my mum used to do that. a psychic told her one of her daughter's was pregnant. she went psycho on me and sisters for months. none of us were pregnant. they're all money-grabbing shams.

Just make up a dark secret like say i once soaked the cat in water when i was 8 or something like that

One of your siblings has to have a dark secret.

Some people just aren't made to be good parents

easy fix, you could've made up something bad, but not very bad, so that you don't get in trouble.

One of you confess and then pull out a bag of dark chocolates. Say you’ll never hide them again.