It seems the rent-a-gob messed with the wrong lady last night, and was forced into silence after Luisa Zissman gave the brazen motormouth a taste of her own medicine.
Jumping on the LuLu bandwagon following her success on Celebrity Big Brother, Katie tweeted: "Luisa. Recruited by Mumsnet to promote their latest campaign for crotchless pants. Inspired."
Instead, the CBB housemate – who placed fourth in the series – hit back: "Inspired by this pic of u s****in in a field mumsnet want u2front 'exploring nature the real way' campaign."
Alongside the quip, the cupcake entrepreneur added a snapshot of the self-titled Horseface doing the dirty with Mark Cross while straddled across him appreciating the great outdoors.
Back in 2007, Katie hopped aboard her former colleague's lap while he was still married, wrecking his relationship before later saying 'I do' to him herself up the aisle.
