The 38-year-old model - who split from John Asher, the father of her eight-year-old son Evan, in 2005 after almost six years of marriage - no longer makes rules for her life because she has no idea what the future holds.
She said: "I`ve learned to say `never say never` because I said I was never going to have a baby before. I still am not planning on having another one, but if it happened, and then if the marriage thing happened to be, probably."
Jenny`s relaxed attitude to the future comes after she recently embarked on a romance with sports agent Paul Krepelka, just weeks after she pledged to take a break from dating.
She told In Touch Weekly magazine: "I`m so sick of my own rules that I gave myself!"
Last year, Jenny split from Jim Carrey after five years of dating, and also enjoyed a four-month relationship with model Jason Toohey.
After splitting from Jason, the blonde beauty insisted she wouldn`t rush into finding a new boyfriend.
She said at the time: "I feel like someone`s out there but I just want to work on me first a little bit more."
Just a month later, Jenny started dating Paul after they met on a blind date.