12-25-2016, 11:54 AM
Nick didn't see Kelly as untrustworthy. They all helped because Nick was convinced by Kelly that Diana falling into the wrong hands would be a great danger some day. This was one of those events that could be classified as bigger than themselves. That's the reason Kelly decided to raise the child of the woman she just found out was a Hexenbiest and caused her son a large amount of pain and out his girlfriend into a coma. She was willing to die if need be in order to do it.