The timing of the 2nd marriage and the 2nd child is...suggestive. However, congratulations are in store regardless. I'm happy for her :)
You shouldn't be surprised by the timeing. She was spliting up with the last husband (before they were married) when she suddenly announced her first marrige and pregancy.
She just didn't announce her husbands name at the time. (Because of their legal troubles and his alleged connections to a Yakuza Family.)