She hopes you both had a really nice time yourselves and assumes that your missus has gone to bed now which you confirm is the case. She knows you had said you would take her home but wonders if maybe she could stay and chat for a bit as she doesn't need to be home for an hour or so and has some time to kill and you can both enjoy each others company and chill out for a while. As everybody is in bed now there is just the two of you and after some idle chit chat between you and her paying you various compliments she notices you are staring at her tits and challenges you on the fact and personal observation in a giggly happy way, where it strikes her that maybe, just maybe, you could have a little bit of 'fun', even though she knows you are very loyal to your wife, but she is not going to say anything and says it can remain a secret between just the two of you. Once she sees you agree, she instructs you to take your pants/trousers down, then pull down your underwear too, and start playing with your cock in front of her and whilst you do this she slowly starts to tease you to get even more aroused and harder by seductively untying her top to expose her very beautiful natural breasts and nipples and fondles and jiggles them for you and imagining they are your hands doing this. She leans forward so you get a closer view and exclaims that if you are not touching each other than it can't be classed as 'cheating'. She simply can't stop playing with her boobs and lifts her top up over her head and discards it so she unfettered access to her 'lovely jubblies' as the expression goes, and sits back in the chair where she removes her trainers, followed closely by her denim mini-skirt which she does in stages to show off her peachy bottom from behind, then removing it altogether so she is almost naked in just her tan glossy legwear.

Time to up the ante as she leans back in her chair and spreads her legs wide and thrusts her hand downwards to her vulva area and starts rubbing and self pleasuring herself over the top of her legwear, and then stands up and turns away from you to present her peachy bottom again so now you get a glimpse of her legwear gusset and the merest hint of what likes beneath. She sits back down again and spreads her legs wide again and this time, using her left hand to continue fondling her breasts, she takes her right hand and thrusts it down deep inside her legwear and makes a beeline for her pussy and starts fingering and self pleasuring her clitoris, glans, labia and pussy in general which is driving you bonkers as you can hear her making squelching noises as she does so furiously lubricating herself. It is clear that you are both very close to climax and she continues to get faster and faster as you do too jerking off your cock until you both simultaneously orgasm and explode your respective cum loads in unison for a truly perfect unexpected surprise treat to cap off the night. Lets hope hope no-one has been woken by the noise you were both making!