VATICAN CITY  - Shunned by the Catholic Church for decades after being violated by a priest when she was just 13 years old, Irish victim Marie Collins described her traumatic experience at a Vatican summit. "I had just turned 13 and was at my most vulnerable, a sick child in hospital, when a priest sexually assaulted me," Collins said on Tuesday. She had just been confirmed a Catholic when the young priest -- a couple of years out of the seminary but "already a skilled child molester" -- began visiting her in the evenings while she lay in a hospital bed in Dublin. "When he began to sexually interfere with me, pretending at first, he was being playful, I was shocked and resisted, telling him to stop," she said.