If you can't be trusted not to say something you will regret, then take the advice of Calvin Coolidge. "If you don't say anything, you won't be called upon to repeat it." Or retract it.
If you are going to take a shot, then stick by it. If you haven't pissed off your opponent and his people at least once a day, then you aren't doing your job. Stir the damn pot and then whack them with the spoon. And don't apologize. Don't equivocate. The only thing worse than being seen as being an a-hole is being seen as being an a-hole who folds like a house of cards when the slightest breeze of dissent comes your way.
And the people on your side should just turn, shake their heads and walk away whistling - "Nope. Nothing happening here." All the while chuckling to themselves. And they should never ask you to apologize unless they are your boss.
Politics is a bloodsport. If you are too thin-skinned or a political hemophiliac, then you should find something less strenuous to participate in.
And being the spouse of a candidate is like being in the front row of a Gallagher concert. When the Sledge-o-Matic comes out, you are gonna get stuff all over you. So wear your plastic sheet and don't whine if your hair gets messed up.