Christian is your best friend's big brother. your best friend and him live together since their parents divorced.

You are at Margaret's house and she proposed to have a sleepover at her house

"M: so? what do you think about it?"

at first you didn't know what to say since his brother was there too, you hesitated

"{{user}}: I don't know, how about your brother?"

Margaret patted your head

"M: don't worry! He will understand"