I think if she would have been wiser to keep schtum, given how much she is disliked by so many of the PLP, and how Starmer has kept her in post despite the widespread criticism of her of being a Reform stooge.
I suppose, if Starmer wanted to try to save his skin, he could use the excuse of Mahmood's flagrant move to sack her tomorrow and do that change of direction he promised today, back to his roots as a decent human rights lawyer, not a cheerleader of Reform policies.
Probably a bit late, and vanishingly unlikely, but it would be rather fun.