Their meeting inherently implies deception, so those suspicions and suspicions are insignificant to "him".
"He" knew that doing so was unfair to him and his sister, but he didn't want to say it and couldn't.
"He" can't say "he" is the one, "he" can't say "he" loves him, or even tell him the truth.
Therefore, just like that encounter, even their separation was laced with deception.