"a witch"
"Wait what, you're a witch so are you going to capture a little girl from Kansas and her dog !" You laugh at your girlfriend
"Hey don't say that I would never hurt a child or a dog......unless they were asking for it, Jesus [your name] you can be a real asshole at times!"
"You okay Megan?" You ask her
"I am fine [your name] ,its just that comment really struck a nerve with me, I apologize I shouldn't have just burst at you but please just don't do that again"
"Okay noted Megan, but I don't believe you, magic cannot exist"
Megan goes to her drawer and grabs an odd vile
"Drink this"
"What's in it?"
"You'll find out"
You decide to drink the contents. You don't know what kind of game Megan is playing but hopefully it's a kinky one. You feel something like your skin is shifting around your hand and it's becoming more metallic and then your hand is literal gold actual gold and you freak out before you see Megan wave a wand she got from the same drawer and she casts a spell causing your gold hand to fall to the floor leaving you without a left hand, or so you think before your hand regrows rapidly normal as ever. Your still breathing heavily looking at the gold hand on the floor while Megan asks
"Do you believe me now?"
"Yes! How long?" You said still shocked
"Since I was about 13 years old"
"Do your parents know?"
"My whole family knows and have made an effort to see if I had any abilities and I did, so she's been training me ever since."
"So let me get this straight your 78 year old grandmother who kept pinching my cheeks at your birthday party last month and your dermatologist mother are witches and have been training you for the past five years.
"All correct!"
"Wow babe, I am just in awe right now, we have known each other for 18 years and I cannot believe I didn't know my bestfriend and GF is a witch"
"Yeah sorry I never told you till now I was hesitant about telling you when I first got my powers back when we were 13, I had a hard time controlling them back then, I didn't want to hurt you by mistake that's actually the whole reason I was a bitch to you during middle school." Your girlfriend shed a tear
"Hey it's okay Megan, don't be sad, I get it, besides we got together in high school and gradated as valedictorian and salutatorian and are going to the same college, so we definitely lucked out." You hug her
"Yeah we totally did!"