Female led relationships discussion

Lately my wife has been letting her pubic hair grow out. Since she knows I prefer her smooth, she’s embracing a more dominant role by growing it in and insisting that I give her pussy a thorough lick every evening.

Last night, while I was performing oral on her, she didn’t even stroke my cock at all. Tonight, though, she plans to strap me down to the bed (we have those underbed restraints), use her strap-on against my arse, and jerk off my cock until I ejaculate, then keep going for another five minutes.

She’s attempted this before without the restraints, but I usually last only a few seconds before begging her to stop. It is pure agony, yet I won’t be able to resist!

I’m very excited by the idea, but honestly, I am terrified. Any advice?