I know I'll be in such a small minority with my comment that it will just be me but I don't think that Peter was jealous when he saw Neal and Maya kissing. I think he was worried. He came looking for Neal, risking everything he had worked for and possibly worse for Neal and yet Neal, the romantic, is quite capable of again, giving everything up for a woman.

Personally, I think that was what was going through Peter's mind, Kate again, not that Maya was anything like Kate. That would be insulting Maya. But if they got McCleash off of the island with Collins, Neal might have decided to stay on the island or stay on the run.