i don’t understand my mother at all

so my best friends mother texted my mother a few weeks ago, and basically told her about a trip about 2 hours away and they were booking a hotel for one night.

my mother said yes, so my best friends mother booked a hotel room and preordered tickets to a place called funspot and my ticket was around 50 dollars

this trip was to celebrate me and my bestie being seniors...

the plan was to go to the hotel, go to funspot and then dinner

then back to hotel, sleep obviously, then go back to funspot and i’d be home no later than 5pm

i’m packing now, and i’ve been reminding my mom and she’s like “i’m excited for you to go as well”

and she texts me and says “you’re not going. i don’t want you to go”

and i ask how come?

and she says “the reason is because i said no”

and i’m like, you said yes.. she paid this money for me as a gift to me and you now at last minute tell me no?

and she’s like “you just piss me off and i don’t think you’re mature enough to go”

me and my mom aren’t close at all after what her husband did to me and she chose him over me of course because she loves him so* much

anyways, rant over. i’m 17, starting school again on monday. it was an overnight trip with people she KNOWS

and my 11 year old brother met a friend online and my mom knew they were strictly internet friends

and my mom drove for a couple hours and let my brother spend the night not knowing who the hell the friend or the parents are.

it’s just not fair. i’m not understanding it.