Chances of pregnancy. Due to this?

Actually yesterday in theater, His girlfriend rubbed his penis through her right hand and there was some liquid on her hand which was making it wet and sticky and it was not the sperms (guess it's pre cum)  for sure and when it was stuck to her hand, she was wiping it on the seat cover... She did it a couple of times as when the interval breaked we got out and she later went to the washroom after 5-10mins as her hands were still smelly and dried up. She washed her hand in the washroom and she used the toilet to adjust her pad as she was on her 3rd day of her periods; she is like she has touched her panties to adjust her pad... I want to know will the sperms enter her panties through this or may she become pregnant due to this? Please confirm at the earliest