It was end of term and everyone was gathering at the college waterhole. I sitting with a few friends when I spotted Margaret sitting alone looking rather awkward. Margaret was my lab partner from Chem class. She was wearing a woollen skirt, a cardigan and glasses. Everyone at college thinks Margaret is a real nerd but she is actually really nice and very smart. I felt a bit sorry for Margaret and went over to say hi. I ended up chatting with her for the whole evening. We decided to leave at about 10. I offered to walk her back to her dorm. We walked back across campus arm in arm talking and giggling.
About halfway back we took a shortcut across a small amphitheatre. Margaret went to sit down and I sort of tripped, we ended up face to face against each other. I don't know what came over me but I put my lips to hers and kissed her. I've always considered myself straight but kissing Margaret felt so nice I didn't want to stop. Without really thinking I put my hand on her knee, and while we kissed I slowly slid my hand up her inner thigh and up under her skirt.
Margaret put up no resistance and soon my hand reached the cotton of her panties. She parted her legs slightly and allowed my fingers to trace the cleft of her pussy lips through the soft cotton. She let out a little sigh. I was getting a charge out of being the instigator.
Slowly I moved my hand up the front of Margaret's panties to put my fingers inside. My hand kept going up without locating the waistband. Margaret threw her head back and half closed her eyes, I could tell that she was about to orgasm. Then my hand felt all warm, I realized that as she had cum Margaret had wet herself! 'Oh god' she exclaimed 'I'm so sorry, I couldn't stop it' she was crying. I gave her a big hug and tried to console her 'Sorry I got a bit carried away'. 'No' she said, 'I wanted you to do it, you must think I'm gross'. 'Don't be silly, I said 'Did you make a mark on your skirt?' She stood up and turned around, there was a huge dark patch on the back. I helped her tie her cardigan around her waist to cover the patch on her skirt.
She took her wet panties off and I put them in my bag. We walked back to her dorm holding hands. At the door Margaret started apologizing again, and I gave her a big hug and a passionate kiss. Then I walked to my dorm with my head spinning.