Watson has previously admitted attempting suicide, using hard drugs, having threesomes, watching pornography from a "young age" and forgetting to wear underwear at horse races.
However, more recently she said that she did not want to be famous, and was working at a Pukekohe beauty parlour.
Ms Ellinger said: "I have Googled [Watson] and I am shocked, she is not the type of girl Pete would usually go for. I am shocked. I do not know what has happened."
"I don't care. I am just getting on with my life and they can go to it."
Watson was married to millionaire Eric Watson and has been linked to Matthew Ridge and Ali Williams.
Evans and Watson would not comment.