Lynne Spears celebrated St. Patrick's Day with her grandchildren, Sean Preston , 2, and Jayden James , 17 months. They were spotted at Kevin Federline 's L.A.-area home on Monday. Lynne was photographed holding Sean Preston's hand. Britney Spears has also been spending some quality time with her boys since reuniting with them in February. She worked out her filming schedule of CBS' How I Met Your Mother last week so that she could still see her boys. Yesterday, CBS released art  ...