Sarah Jessica Parker uses surrogate to carry her twins: custody battle looming?

Amidst rumors of infidelity and marriage problems, Sarah Jessica Parker and her husband Matthew Broderick have pulled a whammy. According to the ABC News and the Los Angeles Times Blog, they have paid a surrogate tens of thousands of dollars to have their babies. The surrogate, an Ohio Native like Parker, is carrying twins, reportedly, and they (the twins) are due to be born this summer.
I just hope there is no custody battle for these babies, no blackmailing and no histrionics a few months down the road, omg I hope and pray…I wonder if the surrogate used embryos from Sarah and Matthew or whether…ok. None of my bisnis….But will this save the marriage? Sometimes having more kids can destroy an already shaky union.