Lex makes the eye contact with Lionel and accepts the envelope. Knowing his father, he has the feeling that whatever it contains is much more important than a simple birthday card and Lex keeps it in his hand, making no move to open.

"Thank you, Dad," he says with a dry air. He can't shake the bristling feeling that was forged and has grown as the conversation wore on, but he can't dismiss a gift either. He'll give it to Aimery to put away safely for now. "I hope you don't mind if I open this privately." It's said to Lionel but there is also a slight note of it to be delivered to Adrian. If it's important then Lex needs the time to process things without an audience.