Can My Girlfriend Get Pregnant If I Only Pre-ejaculated On Her Shorts While She Wore Two Layers Of Clothing During Dry Sex?

Me and my girlfriend were having sex and i was the only one naked and she was wearing 2 layers of clothing (shorts and underwear) while we were humping each other, is there a possible chance that she might get pregnant? I only pre-ejacualated on her shorts and didn t entirely ejacualated