Patroclus waited in the background, feeling apprehensive. He was convinced Helen's brothers would hate him and why not? Everyone who knew them seemed to disapprove of their relationship. Why not two more. Expect Helen actually cared about the opinions of Castor and Pollux and that terrified Patroclus. He loved Helen and he didn't want to lose her.
He smiled shyly at them, but hung back so they could have their reunion first. It was how it should be.