Can't say I'm surprised.
When I was doing cable in LA about 20 years ago I met Movita Brando, Marlon Brando's ex wife. She was old even then, but was beautiful when she was younger.
Anyway, she told me she used to be good friends with the Cosbys.
She told me she was having lunch at their house one afternoon. She was sitting next to Bill at the table, with his wife Camille and a couple of their kids sitting opposite them.
She said they were eating and chatting when she suddenly felt Bill rubbing her leg under the table, laughing and joking like nothing was happening. She said she abruptly stood up and said she had forgotten something very important she had to take care of, and left. She said she never went back there again.
I asked her why she never said anything about it publicly. She said "He's Bill Cosby. No one would ever believe me."
So yeah, I'm not surprised.