I was having a 2-way masturbation with a girl, and I cummed on her chest, none of it got inside the vagina. She touched the cum and got a lil bit on her finger, but she wiped it off afterwards, we're not 100% that she wiped though. It was not for a while until she started to finger, and I started to finger her also. Of course, my penis did not get anywhere inside her vagina. Then the next day she had her period. Is there a possibility she could get pregnant? And if there is, what are the chances?