Steven Tyler‘s fiancee is a “Monster?"

Steven Tyler‘s new fiancee is bad news!

According to American tabloid In Touch Weekly, Erin Brady who the 63-year-old got engaged to over the holidays is a a hard-partying hothead who will lead him down a dangerous path.

“Liv [Tyler] and her sisters are about to get the stepmom from hell,” a source said.

“Erin used to have a reputation for getting drunk out of her mind and lashing out in violent outbursts. Now she’s an even bigger monster than before.

“Nobody wants to see him marry this woman.”