That question seems to either surprise him or confuse him. It's hard to tell which one of the two in particular it is, but he is giving Nita a slightly startled wide-eyed look.

"I don't.. think so?" He sounds unsure though. Mostly since Nita is smarter than him, and with how vulnerable he's feeling today, Inigo's insecurities prey even more on him than usually. What if she's catching onto something he's just never thought about before?

"I mean, my older sister.. she traveled back through time with me too. And she's already been born in the past. Um, the new baby version of her, I mean.."

Though Inigo has never seen those two versions of his sister together in the same place. Probably since it was just safer to stay away, since it's not like they would have known what would happen otherwise.