Myleene Klass admits she thought that she would never be able to trust again before she found love with partner Simon Motson.
The star's ex-husband Graham Quinn left her six months into their marriage.
The singer and radio host, 40, is now five months pregnant with her third child, her first with her new love, and now says she would not rule out marrying again.
She told Hello! magazine: "Since the day we met, Sim has been incredible. Not in a million years could I have ever imagined this would happen. I never imagined there was a person out there like him."
She added: "I am an old fashioned girl and if we did that (got married) it would be more for the children.
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"But I know better than anybody that it is more than a piece of paper and a ring that holds something together.
"It's patience, love, dedication to each other, honesty and having the same morals.
"If I thought he had it in him to walk out on a family or cheat, I couldn't be with him.
"We are not bound by our pasts. I always thought I would never trust again. But then I met him and I forgot everything I ever said.
"I'm not frightened of anything any more because I've already been through hell and I know I can survive it.
Myleene Klass shows off baby bump following cute ultrasound visit with her boyfriend
Motson also already has two children from a previous relationship and Klass said: "We look at them all and think how did we plan this?! There are going to be seven of now which is a lot!
"We have come through so much as a family and to think that this is another chapter I had never planned on writing is just magical."
The broadcaster said all the children are excited about the new arrival, adding: "Everyone in the family decided to call the baby Snoop as the working title. Our children have a list of names up at home. One of them said if it's a boy they want us to call him Jason Derulo!"
