Can it be that she transferred some of his semen when she applied the cream on her private parts?

My best friends boyfriend went to her house and they made out and she gave him a h*** j** and he c*me onto a towel and they left it in their guest room and the next morning (16-18 hours later) and she said the towel was slightly damp and she has a Yeast infection and she rubbed cream on her lady parts, she didn't wash her hang after touching the towel but said her hands were definatly dry, she's really worried is there any chance she could be pregnant