Ezio chuckled, but it was a little sad.

"There is no need to worry about that. I cannot take outsider women to the headquarters, and there is no one left here for me."

Caterina's gone, is the unspoken phrase, but he regrets even thinking about her. He just feels lonely and self-loathing when he does, and maybe even a little angry with Caterina, even if only in memory, for failing to be his second chance at love.