This episode was good, but it could have been better. There is far too much exposure on the parts of Billie and her sister. This show is about the sisters.
Since this is Paige's wedding, where is Penny, Patty, Sam, Victor and Darryl for that matter?
And as for Victor, how did he take it when he found out that Paige was Sam's daughter by Patty? They have never addressed this. It is just like it is a non-issue. There would have
to be some fireworks to that revelation.
Back to topic, with all the demon fighting/chasing that the Halliwells have done throughout the years, they wouldn't be that stupid to Billie's sister. I would even know that something is off with her.
I got to think that they know more than what they want people to think they know when it comes to Billie's sister.
It could have been developed a little better, but it was still a fine episode.