She cums quickly, alerting nobody

Realising that you need to get this over with as quickly as possible to try and draw as little attention to you as possible, you decide you best help her along. Figuring that bouncing up and down would be too obvious to the other passengers you settle back onto her lap and begin to grind your hips round in a circle whilst squeeze your anal ring hoping this will please her enough.

This seems to have the desired effect as you begin to hear low groans coming over your shoulder. You feel one of her hands brush against your back as she paws at her breast, the other comes down to rest on your thigh stroking up and down.

After about a minute of this, your cock hard still in your pants and your anus feeling resentful of the amount of work it's been put through today, the hand on your thigh suddenly squeezes down hard and you hear a grunt in your ear. The expected release duly came flooding your hole with thick white semen. What surprised you was how long it went on for, with it only trailing off after the 15th blast.

"Thanks for that dear, always good to relieve a bit of stress" she said "And it has been a while."

With that she pulls up your pants, tucks herself away and then reaches into her bag by her feet pulling out a business card which she slips into your pocket.

"Well this is my stop, be sure to call me if you're interested in another round." She said slipping out from under you and heading off the bus.

Looking up you see that you're in the shopping district about 5 stops from your house, you can already feel the contents of your ass leaking out and soaking into your pants and there does seem to be the smell of sec coming from you.

Should you get off now and use the restroom in one of the fast food outlets to get cleaned up and then walk the 15 minutes it'll take to get home. Or stay on the bus and hope nobody notices the smell or the wet patch.