Pamela Anderson's heart was ''too open'' when she married Jon Peters.

The 'Baywatch' actress wed the 74-year-old producer in a secret ceremony in January but they split 12 days later and insiders claim the 52-year-old beauty immediately regretted the union.

A source told the New York Post newspaper's Page Six column that Pamela had just returned from a month-long ''spiritual cleanse'' in India when the 'Star Is Born' producer popped the question and her ''heart was open, but, in hindsight, too open.''

The source added: ''Pamela does not operate on the same wavelength as other people. She has a huge heart and she loves big, fast and hard.

''She came back from her trip and Jon said to her, 'I love you, let's get married.' So she said, 'OK.' ''

According to the insider, the blonde beauty thought she had made a ''terrible mistake'' after she and Jon - who she first dated 30 years ago - had spent just a day and a half together as husband and wife.

Pamela reportedly found her new husband overbearing and too focused on fame, which no longer interests her as she's more devoted to her charity and activist work.

The source said: ''[Pamela felt Jon was] trying to be too controlling over her.

''Pamela felt that he was frustrated over how she wanted to maintain her financial independence ... He started to make calls about her career and cast her in a movie he was working on, things she didn't want.''

The pair never filed formal paperwork for their marriage, so it wasn't yet legal when they decided to go their separate ways.

The 'Barb Wire' star confirmed last weekend she and Jon have ''taken some time apart to re-evaluate what they want from one another'', less than two weeks after they tied the knot.

She said in a statement: ''I have been moved by the warm reception to Jon and my union. We would be very grateful for your support as we take some time apart to re-evaluate what we want from life and from one another.

''Life is a journey and love is a process. With that universal truth in mind, we have mutually decided to put off the formalisation of our marriage certificate and put our faith in the process. Thank you for respecting our privacy.''