"I do. He came back again with another problem." A problem that they had eventually solved, and not without great effort exerted to do so, but Bulma... is hesitant to share. How exactly does one say that they deleted the entire timeline, basically, and shuffled Trunks and Mai off to another one to continue on their lives and, presumably, get married and have kids or something there?

So she'll fudge it a little.

"We took care of the new threat and he's better, now. It took Goku and Vegeta both, but what challenge lately doesn't?"