[Boris]

The responsible thing to do is go with her to the clinic or wherever and get the morning after pill. Many women need support to do this and it is your responsibility to help them since she gave up the poon. Once you know the baby is yours, you are morally obligated, at a minimum, to provide child support and health insurance and clothes. You should also maintain enough contact with the mom so that the child can know who you are if that is the way things work out.