Felt rushed and not fully developed.

Timing. Monday is not the middle if the week. Don't use days of the week if you can't keep it straight.

Whoa!

I'm still confused about what exactly happened with the girls and Rory after karaoke night.

The way the story played out for me is 3.5.

Being a hockey fan the away game schedule of 1 away game here and 1 away game there doesn't jive.
What are two graduate students doing at a sorority party during rush week?
How old is their half sister to have a 3 year old kid?
All of this and more really brought the story down for me.