Game night

The following is allegedly taken from a conversation I had with my sister some minutes ago.

10:16:20 PM me@hotmail.com: ok, let's play a guessing game
10:16:27 PM me@hotmail.com: i'll go first
10:16:32 PM me@hotmail.com: i'm guessing you should be in bed
10:16:34 PM me@hotmail.com: ok, i'm right
10:16:38 PM me@hotmail.com: now it's your turn
10:16:42 PM me@hotmail.com: but i'll give you a hint
10:16:42 PM sister of me@hotmail.com: haha
10:16:53 PM me@hotmail.com: i'm either a) studying, or b) watching gilmore girls
10:17:03 PM sister of me@hotmail.com: i'm guessing that i need to do my homework if i want a good grade
10:17:07 PM sister of me@hotmail.com: ill go with B
10:17:08 PM sister of me@hotmail.com: :)
10:17:16 PM me@hotmail.com: wow, you're psychic or something
10:17:20 PM sister of me@hotmail.com: i know