What further can I / should I convince her to do?

Hey all - looking for ideas.

My highly religious and sexually conservative wife has some very expensive things she wants, and it has become apparent that she will do sexual things for money over and above our normal finances.

I have a major shoe fetish and many years ago she gave in to my shoe fetish because she found it easier and more convenient than sex. We still have sex, but I fuck and cum her shoes 100x more than we have sex. She doesn’t love having my dried cum all over her shoes but she feels slightly bad that she doesn’t love sex so she deals with it. 😈

Several years ago the shoes thing was the ONLY thing she would do outside of the norm. But her laziness towards sex paired with her desire for some expensive things have seemed to somehow made her open up to do things I want her to do for me.

So far I have gotten her to ride a black dildo while sucking one. I’ve got her completely covered in whipped cream while she fucks a black dildo. I’ve face fucked her and then finished on her shoes. I’ve got her to ride a dildo mounted in her shoe. I’ve got her wearing cum stained things in public.

The next thing that she was super hesitant for but I finally convinced her is a fucking machine. I ordered it and it came in the mail and now I’m excited to get her to use that, with a black dildo.

What are some other super slutty things I should convince her to do that wouldn’t be too far away from where we’ve come? Like she will not at all be open to fucking someone else, ever. And watching porn she will never do. So that’s off the table. But I’ve fantasized about asking her to pick out a dildo while she’s getting fucked by one with the fuck machine, because some websites have pictures of the guys half naked with the dildo’s. And I’ve thought about fucking her while she throats a black dildo on a mirror.

What else should I do?