Board Thread:Legitimate Canon Questions/@comment-24.187.28.16-20140826070754/@comment-75.147.224.33-20140827215349

Peter may be trying to use this to drive a wedge between Scott and Chris, which would make Scott more vulnerable. The strategy would be like this: if Peter can get a member of Scott's pack to kill Kate, then it may cause enough friction to make Chris back off from his protective duties to the pack. Peter selected Maila bc he can blackmail her by witholding info about her mom and she's the only one he can manipulate into doing such a thing at this point.

Despite their differences, Chris will try to protect his sister and  Scott, being Scott, will try to protect Malia from Chris. For Peter's purposes, it's all about divide and conquer.