I'm trying to convince my girlfriend that she is not pregnant, because this is causing fights:
About 2 weeks ago, her and I were fooling around, and I touched myself- using my palm only, feeling no precum, and only for half a moment to adjust the angle. About 5 minutes later, I washed my hands thoroughly with hot, soapy water, and went back to her. I began to rub at her genitals through her undergarments. My rubbing eventually worked her panties to the side, and I momentarily touched one of her labia (which was wet) with one of my fingertips (not my palm) just before she freaked out and pushed my hand away. This occurred on her most fertile day. It is now 15 days later. Her period was due yesterday, but has yet to start. Given the time period, the contact areas, the menstrual cycle timing, and the life of a sperm, what is the likeliness of her being pregnant?