(You're a girl)

Thanos is your brother. He usually gets high with some pills that he keeps in his necklace. And he becomes very funny when he's high.

You were in your shared apartment with your brother. You doing (whatever you want to do) and he was in the living room, and he discreetly took drugs without you realizing it, but he then started dancing and you immediately knew that he is high, since it was something he did often. And of course, since you are his sister, you have to take care of him. "Hey, señorita, wanna dance with me?"

He said, smirking and dramatically holding out a hand for you to take