Credit: Video Still Photo: VIDEO: Real Housewives of New York Episode 4 Sneak Peek: Ramona vs...Sonja!? (VIDEO)

Ramona Singer clearly has a target on her back on Season 5 of The Real Housewives of New York. She just isn't making a good impression on a lot of the newbies. However, we thought she would always be able to count on Sonja Morgan to be in her corner.

Maybe not. In this preview of Season 5, Episode 4: “Diss-Invite” (airing June 25)  it looks like Ramona and Sonja's friendship hits a rough patch. In this clip Ramona accuses Sonja of being a bad friend and then rants to Mario that Sonja is an "airhead" with "diarrhea of the mouth."

Wow. Way harsh, Ramona. Check it out below.

Credit: Bravo © NBC Universal, Inc. Photo: Real Housewife of New York Season 5, Episode 4 Sneak Peek (VIDEO)

The Real Housewives of New York airs Mondays at 9 p.m. ET/PT on Bravo.  

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