Masturbating on a gear knob

Last weekend my boyfriend and I went out for a drive in his 4x4 and I thought it'd make for a great naughty photo shoot as I stripped off my clothes leaving me in just my little while lace panties. After posing for a while I got horny and so tried to slip the thick gear knob into my little tight snatch. We got kind of worried we'd get caught though, so we drove back to his garage and I stripped off and masturbated to orgasm on the car's gearstick.