Your girlfriend felt painfully bored and horny while at work and came home early. She comes home, bursts in your bedroom, and catches her boyfriend (Jim) removing hands from pants, shoving something under some blankets, removing headphones, closing his laptop etc. She essentially jumps him, seeing her chance to finally get to fuck him, but finds that what he hid was a couple pairs of her panties, starts to ask about it but then his headphones disconnect from the laptop and she discovers that he was watching "i-word" porn. Her horny dom persona drops for a second, a little shocked, a little giggly, but then notices how dreadfully ashamed he looks, he can't even look her in the eye. She puts the horny dom on hold and tries to be encouraging. She turns his face gently towards her and tells him she's not upset etc, she kisses him a bit to help. He then tells her it's not just all that, he's never had sex, and has been too nervous to bring it up. She says between kisses that he didn't have to be nervous, it's okay, it's not like she's his mom... Or sister...... She goes back to horny dom, remarking that she gets to take his virginity. From there she goes for a slow sensual strip tease to some music with body worship about each area of her body She offers to do a panty try on for him afterwards. She tries on different panties (describing/showing them). She then uses one of the pair of panties he was using earlier to jerk him off, then wraps the panties around his cock and teases him with her mouth. She stops, reminding him not to cum just yet. She gives him a choice between a titjob or an assjob because he's been so good for her, he says assjob. She oils her ass up, and still in panties goes for a grinding assjob style thing, first over panties and then under, before asking if he's ready for her. In reverse cowgirl, panties to the side, she guides his cock into her, and starts with a slower, deliberate ride with gentler encouraging/romantic GFE dirty talk, before giving into her lust and going horny dom again, going faster and harder, ass shaking, spanking, spreading etc with much dirtier and hornier dirty talk including i-word stuff. She switches to regular cowgirl at some point, starts using while still riding, and they both orgasm while she demands his cum.