Naturally, Moon did not respond. She was sleeping, as she fused with her world which was also becoming a realm. It would be a long time before she woke up, which honestly sucked for Lex a bit.
They'd eventually reconnect, should nothing unexpected happen, but by then Lex would have lived a long life, whereas Moon would still have the mere experience of a few decades. The difference between them would be immense.
"Someone recently told me that I am carrying an immense amount of Karma," Lex said. He did not even know if Moon could hear him, or if she would remember this conversation. But from time to time, Lex came and chatted with both Moon and Liz.
At least Moon was still friendly towards him - at least based on the last time they talked. Liz, on the other hand, had been so wary that she wanted to escape as soon as she could. Quite frankly, Lex was convinced that the moment she finished bonding with Nemo, she would bail, which was fine.