Singer Whitney Houston had cocaine fuelled lesbian sexual encounters, according to her sister-in law.

Tina Brown claims the artist has had a series of steamy same sex affairs which her brother, Bobby Brown, Houston’s husband, allegedly has been aware of.

She told the National Enquirer, “It’s no secret. I’ve seen her with a woman a couple of times. They were walking around without shirts on when I came in the house.

“Bobby would say, ‘She’s with this one and that one’.”

This is not the first time she has made accusations against the star, last month she said Houston locks herself in crack dens amid rubbish and sex toys.

She said she was making the claims to help the Grammy winner kick her drug habit.