"My sincerest apologies," she answers, not particularly sincerely. "But please don't feel pressured to repay me, et cetera."

What she meant is that she doesn't think Zagreus cares about returning kindness for the sake of it. And she's never cared enough to be properly scared or disgusted by him - she saves that for her husband. Her feelings about Zagreus is probably something like positive but vaguely disapproving, which ends up somewhere around neutral.