Levi Johnston's little sister hates the Palins even more than he does.
Calling out Bristol Palin as "evil" and a "sociopath," a vengeful Mercede tells (her version of) the naked truth ... while posing nude for Playboy. Fitting.
Mercede Johnston, 19, calls Sarah Palin a terrible mother who's "never there for [her children]" and who "doesn't make her kids go to school. She'd rather parade them around and put on a show, at book signings or conventions."
COMIN' ATCHA! Mercede and Levi Johnston don't mess around!
As for Bristol Palin? "Everything is always about her, her, her. She has to have her own way. She'll be super sweet and then she turns into the most evil person I have ever known ... Honestly, she is the meanest person."
Mercede Johnston adds, "I didn't know someone could be so vindictive and evil ... [She's] a sociopath. She doesn't think anything she could do is wrong."
She also claims Bristol and Levi planned their pregnancy, and drinking made Palin so "promiscuous" that Tripp's paternity was somewhat in question.
Oh, and Track Palin is a drug addict who Sarah made join the army so he wouldn't embarrass her politically. Imagine when the FULL interview comes out!