Me and my gf fully clothed me ontop of her

.. Just want to clarify with you guys.. Me and my gf fully clothed me ontop of her.. I had jeans and boxers on .. She has skirt, tights and knickers on.. Just kissing.. And i ejacualted in my boxers but had jeans ontop of them.. while ontop of her (BOTH CLOTHED AS MENTIONED ABOVE) and the ejeculate followed thru onto my jeans.. Please tell me that wet patch on my trousers could not get thru her skirt/tights/knickers and get her pregnanat while i was ontop of her near her genital area .. Becuase we were both fully clothed as mentoned above.. I feel a lil silly for even asking buh just wanted to clarify and was only ontop of her near her genital area for almost 5-10 seconds once i ejaculated in my boxers...