ABC News(NEW YORK) -- A 99-year-old Pennsylvania woman got to meet her 100th great-grandchild in person earlier this month. It was a once-in-a-lifetime event for Marguerite "Peg" Koller -- also known as "grandmom" to Christine Stokes Balster and her husband Patrick Balster -- who was "absolutely ecstatic" to greet baby Koller William Balster after his