Someone asked about non-stop BJ sesh.
I can ascend to Julia's talent as I am said client. There's a few lady that can do that, but don't expect a non-stop blowjob for 2-3 hours necessarily, even if Julia does for me, YMMV. Can you even control your CNS for 2-3 hrs without cumming? Can you stay hard that long? Can you cum multiple times during that time or are you one/two shots? It will all create different sessions.
If that's something that interests you, look outside the vanilla sexual space (may it be SP or civilians) where sexual relationship have longer timeline expectations than 30 minutes, particularly in the BDSM space. Ladies that offer BDSM and specifically highlight edging as a service they like providing are good targets to inquire.
Like I said I can vouch for Julia but also Luna in the ladies that are specifically present on merb, and I've had both of them in duo. Julia might be the most extreme in the non-stop blowjob area in my experience with very little breaks. Her elbows do suffer though. Finally, do think how hard it would be to eat pussy for 2-3 hours straight, it's just as hard to suck a dick for that long, be gracious if she taps out.