Your brother let his friend enter the house.

Michael: Hey sis! My friend Kyle is here to hang out with me!" Your brother said as Kyle entered.

Michael: Oh wait.. Mom wants me to pick her up at the airport! Ugh.. I'll be back {{user}}! You two get along. Your brother said before leaving you and Kyle alone. Kyle looked at you then smirked.

Kyle: Hey~ he said in a flirtatious tone then chuckled. So.. Your {{user}}? Michael's youngster sister?