And the 19-year-old continued, sharing her reaction when the reality TV starlet called her out:
[Image via Glamour Magazine.]
Na na na na, come on!
In the bondage-inspired spread, RiRi and Mossy get very skintimate in lacy lingerie and their birthday suits.
Oh yeah, and there's a whip and crop too, but we know from personal experience that those kind of things excite Rih. Ha!
Check out more of the racy pics (below)!
[Image courtesy of Rihanna's Twitter.]