Made me cum in her panties and put them back on

My girlfriend came to me in her sexy lingerie to lean against me and make it hard. i thought she would take me to bed and jump on my cock, but what she did to her was grab her and jerk her off by rubbing it against her pussy. when she wanted me to realize her, she was about to come and as she had her panties down she asked me to cum on them. her very sow was touching her clitoris while i released sperm into her panties, and to my surprise she put them on again as if nothing had happened and she left me there with a silly face and still horny ...