'Bad Sister' has a wildly uneven tone. It ranges from petty plot pieces that would be right at home in a soap opera, like planting drugs and alcohol on people, right through to murder. The problem is that all of it is done in a completely uninteresting way. I understand these Lifetime movies have a lot of restrictions on them in terms of the level of violence, language and sexuality they can show, but all that means is that they have to be more creative in terms of their writing. Unfortunately this was about as cliché and unoriginal as you will ever get in modern film.
The character of 'Sister Sophia' (otherwise known as 'Bad Sister') was the only thing really carrying this. She was mildly well played by Alyshia Ochse, who definitely pulled off the sexy side of the character, and gave a decent dig at the evil side of things. She wasn't given a lot to work with in the script admittedly, so I'm going to give her a pass mark. Unfortunately, as far as positives go, there is nothing else worthy of mention here. An altogether forgettable experience that is not worth your time or effort.