The Republican strategist behind the anti-Donald Trump ad featuring the billionaire’s wife Melania posing nude for a magazine turned to Twitter Thursday evening to rant against the billionaire.

Liz Mair, who operates the anti-Trump Make America Awesome super PAC, ignited controversy when she targeted Utah Mormon voters with a web ad featuring a naked Melania Trump handcuffed to a bed. The photo was snapped as part of a special for GQ Magazine.

Despite the ad being created by Mair who operates an anti-Trump super PAC (the group is not pro-Ted Cruz, simply anti-Trump), Trump accused the Texas senator of being behind the ad. The billionaire warned Cruz to “be careful” or he would “spill the beans” on his wife. On Wednesday night, Trump posted an unflattering image of Heidi Cruz.

Mair turned to Twitter Thursday evening to knock Trump and address controversy over the ad.

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