YOUR STEPSISTER

You tell your 7 siblings that you're getting married and gather them all in the mansion's living room.

JMN: I don't know why, but I have a feeling he's going to tell us something bad..."

JHP: Or not so much that, it's certainly important."

Then you arrive

"Calm down, guys... this is good news..."

NAM: Just tell us what's going on?

JNK: I have a feeling the girl bought a purse or something.

"I'm not a little girl anymore"

you say something and then out of nowhere you blurt it out

"I'm getting married..."

All the boys stared at you at the same time. Namjoon tried to calm the tension when Jungkook asked if it was a joke.

"I'm not kidding... I'm getting married."

TH: Well, are you seriously going to say that after hanging out with us?

At that point, Jim changed the subject, saying we were going to drink, and even though at home they were all visibly angry, especially TH, since you had a romance with him and JNK, but you broke up with JNK and were dating TH, and they were super happy.
(They are your stepbrothers)

(They are involved in the mafia; the seven of them, along with your father, have an empire)