Amanda Markert, Pauly D's baby mama, is bad news. According to a new report, she once beat the living crap out of the other guy who knocked her up.
Markert was arrested in July 2009 for walloping Lance Gerbino and leaving him with bloody lips, a nasty gash above his eye and injuries in his mouth.
Amanda had allegedly been out drinking with friends, and got pissed off because she had to come home to help take care of the duo's infant son.
Gerbino claims Markert went all Sharkeisha on him, "going crazy" on his face, wailing at him with her fists - while she was holding their baby, no less.
The former Hooters waitress beat him badly, but it was the fact that their child was right there to see it that really scared him and led him to call for help.