So here I am at my dads house in Phoenix. I  will be relying on him for transportation. That means no incall, only outcall. How do I keep an escort quiet when I'm fucking her brains out in the room next to my dad and stepmother?

Shove his cock in her mouth so mom doesn’t hear, works for me LoL

How about getting a room at a motel nearby?  

Get a freaking Uber to her in call or when you turn 18, move out of your parents house.

Then the two of you go out and get drunk.  Then the two of you come home and both do your stepmom MFM.  After all, she's not your real mom.  

While the Valley of the Sun isn’t know as having great public transportation, check out the light rail. If your lucky it might run near your Dads place. The one day pass is $4.00. Way cheaper than Uber of Lfyt

Because of your age certainly they know that you’re an adult and as an adult life they don’t have to know what you’re doing for a living you probably only going to have one or two anyway no volume and respect for your parents should work out OK instead of hitting the wall just get on the floor sounds a bit painful .

Funny thing is that I just read on another board that a dude's cheap ass son is staying at his house in Phoenix so he and the wife can't arrange for their favorite Wednesday night MFM threesome.

The world sometimes is that small. Hahahaha.

It's not just her you need to keep quite.  Beds make noises too.  If you're brave/stupid enough to do what you're thinking, be sure to do it on the floor or someplace that won't be making that all too familiar rhythmic sound, which I'm sure your parents are more familiar with than you are.

If you can afford an escort, then you can afford cab/uber fare.

Cab it or Uber,  Get A room or her incall  🤣

Can Uber get into a gated community?

No such luck

I'm assuming you don't have a job cuz then you'd have a place of your own.  

Uber will drive you door to door

Maybe come back when you hit 18, OK?