Fucking my ass with a huge tentacle dildo on my fuck machine

I like a challenge and mounting the huge Nothosaur Alla tentacle dildo on the Fuck Yeah machine was certainly that! Keeping it in my ass without it flying out was the next challenge! It was hard to get up the speed and motion that I needed to cum and I could only take it half way so I decided to take it off and sit on, with about three quarters of it disappearing inside me!