I´m looking for anything that is something like girl/femboy buying an amazonian futa android much bigger than her* just so she can command it to ruthlessly to top her and fuck her into the mattress 6 hours straight.
I wonder why this is not more popular concept seem in hentai

Anyway here's pretty popular sadpanda about dude who build himself a sexdroid. I think it's now completed
https://exhentai.org/g/3178252/191c81d081/