in case you didn't know (bestfriends brother)

Erin and Kalynn have been best friends for as long as they've lived, Erin is also really close with kalynn's twin brother weston, although recently weston has been getting on Erin's nerves a lot by teasing and picking on her.
Little does she know he's not trying to be mean, he's just doing it because he kinda likes her...
or, really likes her.
and when erin starts to fall for weston she fears that kalynn will be upset. Maybe it's too good to be true. or will they have to hide whatever is going on?
will they pull it off?
does kalynn get upset?