The actress, who is married to Laurence Fox, said that she would not allow him to be friends with his ex-girlfriends despite the fact that she is still close to her ex-husband Chris Evans.
Piper told The Observer: "I'd be furious! I'm a jealous partner. You're entering serious bunny boiler territory when Laurence even has to hold hands with a girl he's working with.
"Chris has been such a big part of my life that he's always there when the big things happen, but that might make everything look more full-on than our relationship actually is. I barely see Chris now."