You're at your girlfriend's apartment and she asks you to help her with her laundry that's just finished drying. As you're helping her fold the clothes you can't help but notice several pairs of her panties. Although you've always had a thing for panties you at first try to act as though it's no big deal. But in a sudden inspiration to be funny you pick up a pair of her panties and hold them up to the front of your shorts. This gets a giggle out of her, so you think 'mission accomplished' as you both go back to folding her clothes.
You think that's the end of it until she holds up the same panties saying, "Well are you going to put these on for me?" You laugh again thinking she was joking but she said it again. You tell her it was a joke, but she said it looked like you really wanted to wear them. Although part of you still thought she was joking you continue to try to talk her out of it. You know she's really not kidding when she gives you her pouty face complete with puppy dog eyes. With that your resolve completely collapses and you agree to put on her panties.
Right there and then you strip off your clothes and pull up the lavender solid lace panties. The lace tickles your junk as you pull them into place, and it isn't long before you're sporting a full woody. She giggles as she looks at your hardon pressing against its lacy confines.
You're quite embarrassed standing there wearing nothing but a pair of lavender lace panties, but soon she's on you petting your junk and a make out session quickly ensues. She pushes you up against the washer and continues to stroke your hardon through the lacy panties.