Ashton Kutcher Slams Sister-In-Law With Gag Order

Ashton Kutcher has attempted to prevent a new cheating scandal from exploding in his face — by gagging his own sister-in-law, can exclusively reveal!

The former Two and a Half Men actor made the move to stop Katie Hightower from blabbing after she divorced his twin brother, Michael, 41, after nine months of marriage, claiming he was carrying on an affair with a married mom from Indiana!

“After we were married, I found out some stuff that I couldn’t live with,” Katie told Radar exclusively at the time. “So I filed for divorce.”

No sooner had she opened her mouth than her brother-in-law — whose marriage to Demi Moore crumbled over HIS cheating scandal in 2012 — slapped her with a court injunction to shut her up!

The court documents contain a clause barring Katie forever from even mentioning Ashton or Michael, who has cerebral…