'Hot In Cleveland:' Joan Rivers, Betty White Argue In Clip (VIDEO)

04/24/2012 01:55 pm ET | Updated Apr 24, 2012

Joan Rivers and Betty White aren't twins, but they're playing them on TV.

In a sneak peek of Wednesday's episode of "Hot In Cleveland" (airing Apr. 25 at 10 p.m. ET on TV Land), Elka (Betty White)'s twin sister, played by Rivers, comes to town.

Between the reminiscing and squabbling, Elka can't help but bring up her sister's plasticized face.

"What have you done to your face?" Elka asks.

"Me? What about you? Natural aging? Disgusting!" her sister replies.

As for how she landed the guest-starring role, Rivers has a simple answer. "Betty White and I have always been sexual rivals," she joking explained to "The Insider" of 90-year-old White. "We've shared a lot of sex partners so it was just inevitable."

"Hot In Cleveland" airs on Wednesday, March 25 at 10 p.m. ET on TV Land.

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