When Your Sister Has a Sex Tape...
...it's gotta be the last thing on Earth you would ever wanna see -- but when we found Kim Kardashian's brother in Beverly Hills yesterday, we asked him about it anyway.
![](https://imagez.tmz.com/image/53/16by9/2016/02/27/5327e66fd3935ef090d84209932f7096_md.jpg)
Robert should praise Jebus Reggie Miller happened to walk by -- 'cause that was the only reason he got out of the most obscenely awkward sex conversation ever.