She's a demanding brat

"They won't let me do anything!" Lori wails. "I'm 18! I'm an adult! And they treat me like I'm still a little kid! I wanted to go with my friends to this festival and they won't let me go! I hate them! I'm gonna stay here with you!"

"Wait a minute," you say, continuing to hug her but getting annoyed with the emotional little brat, "I have roommates. You can't just barge in and say you're staying here."

"I could sleep on the couch! Or on the floor of your room! I won't be any trouble! Please Lisa! Just until the stupid parents come to their senses!"

"If you want to go the festival and you're an adult why don't you just go?"

"Because I'm broke and I asked to borrow the money to go, like for admission and food and stuff. And they won't lend it to me! I told them I'd pay it back! I promised!"

You know from experience that Lori's promises aren't worth much, so you're not surprised your parents refused her.

"Before you ask, I'm broke too," you say quickly. "I had to scramble just to pay rent this month. So don't even think about asking me."

"But you'll let me stay? Please Lisa?" she asks, pushing her lower lip out in the pout she's used for years every time she wants something.

"I don't know Lori. I'm invited to a party tonight, and like I said I have roommates..."

"You could take me to the party!" she says brightly, cheering up immediately. "That would be fun! And then I could crash here this weekend and maybe the stupid parents will smarten up! Please Lisa! Take me to the party!