Complex sentence: Ronnie and Jack got married in November 2010, and Ronnie gave birth to a son in December, she named James, he died from sudden infant death syndrome and Ronnie swapped him with Kat and Alfie's baby.
Split into simpler sentences: Ronnie and Jack got married in November 2010, and Ronnie gave birth to a son in December who she named James. He died from sudden infant death syndrome and Ronnie swapped him with Kat and Alfie's baby.