Hap had been about to open his mouth. He still needs to tell her about his vasectomy. But there's nowhere for them to go from there. He'll bite his tongue until he's on his way out, which shouldn't be long.

"What is it?" He will not promise not to get mad, because it would sound silly to his ears. He certainly doesn't plan on it. He doubts he has the reserves of vigor to get that worked up a second time, anyway.