Mongoose Hunting and the Dark Car

I rub the side of her butt, and slide my hand under her dress. I realise then I'm basically under her tight yellow dress, and I'm right. No underwear. I rub the outside of her leg and move my hand upwards under her dress to grab her boob. She moans as I grab it. I have gotten carried away, and we both realise at the same time. I have accidentally pulled her dress up, while trying to get to her boob, and she is now bottom-less. A car flashes past and I think I see something..

I put my hand down in the now darkness to confirm, and yes. It's happening again. She has a beautiful hard cut cock under that dress. About 6 inches and small-average girth, which fits her slight build. I am so horny I really just wanted to put it in my mouth immediately. She pulls her dress down, embarrassed and afraid that her father would notice. If he was awake he would have dragged me outside the car and beaten me up. 

She hides her cock again, and is embarrassed. I can't tell if she's embarrassed that I've seen she has a cock, or embarrassed that she has just exposed herself potentially to the whole car. She pulls her hand away and I get a cold feeling of shame. Ten minutes pass, and I decide I can't let this situation get away from me. The potential is too good. I place my hand on her bare knee. And start to move up towards her cock slowly. 'No', she whispers in my ear. 'You don't know...''I know you're trans', I reply. Her eyes go wide with delight. 'And I want to put your beautiful trans cock in my mouth. I move my hand up her thigh and put it between her legs. Her cock is still hard and I feel it full in my hand and start wanking it. She moans softly. I really wish the radio was on. Fuck sake. She puts her hand back in my zipper and starts wanking me off. 

I grab my coat from behind me and put it on our laps so that we can do this with some element of privacy. I rub my other hand all over her body and her dress is now almost completely off. She is essentially sitting bottomless, in the back of the car with her dad asleep beside her with one tit out. And what a gorgeous tit it is. I want to put it in my mouth, but I'm afraid that too much movement will alert those in the front, or even worse, wake her dad. My coat on our laps can only cover so much.