Does Whitney Houston KNOW what her husband Bobby Brown is up to? Does she CARE? Bobby, according to a friend, has moved into the home of the notorious Video Vixen Karrine Steffans.

This is the woman (nicknamed "Superhead") who wrote the outrageous book revealing the sex habits of her many famous conquests from Jay-Z, Shaq, Ja Rule, and Bobby, too. Whitney was reportedly furious when she heard Bobby had cheated with Karrine while they were together.

Things have gone downhill ever since. Karrine, described by many as a "gold digger" has been hanging with Bobby for the past month.They've been seen together at the Grove mall (with Bobby's kids) and several times at the private club Xenii. (Once Bobby even brought his kids to the club till 5 AM. )

Our insider snipes that Karrine is USING Bobby because she wants her own reality show and Bobby's TV producers are often with him, trying to resuscitate Being Bobby Brown. Is this the last straw for Whitney?