Make your sister move in.

"Since you said you will do anything for me. I just want you to proof it. Convince your sister to move in with us right now." You say.

Carrie looks confused at you unsure what your plans were with this. But then she just takes the phone from you again and starts typing on it.

She waits for a reply and then starts typing again.

"Well she said she will come over. But I haven't told her about moving in yet. I will try to convince her when she gets here." Carrie then says to you.

You just try to do your own thing in the house. And play some games on your phone. Untill after some time the doorbell right and Carrie opens up.

You see that her sister arrived and you walk up to the living room too to greet her.

Carrie and her sister start talking. And you just sit next to them listening to the conversation.