Lochlan is not torn between his brother and sister anymore.

Although this theory was plausible initially, it's clear that he prefers Saxon over Piper. He's always giggling at Saxon's 'jokes' which Piper despises, and now he actually abandoned her and decided to spend the night partying with his douche brother. In the first episode, he was actually trying to make them both happy by going with his sister to the temple and later joining his brother at the pool. Now he's totally on Saxon's side.