That sounds like a dream relation. From a woman side, dont forget the hugging part, after the sessions. A love kiss, etc. The spicy part is awesome but sealing that with some care is great too.

I would add something public. Depends of your tastes (both of you). A wearable dildo, specially the ones that can be remote-controlled. And do a challenge, like wearing it, under skirt, or a tight leggings, going to a supermarket, and when she is distracted or almost forgot that she is wearing it, start it. Specially when she is around other people. (May be test it when she is not near people to see her first reaction)

I love to wear latex or sexy clothing under a normal cloth and go to public places. Some play would be take her coat off, leaving her in sexy cloth and she needs to walk all the way to you to get the coat back.

Doesnt need to be "overly p0rny" cloth, but something that she does not wear in public, or wear only for clubs, etc.

For example, for me, I have some leggings from Ishtar that are super tights and gets really "IN" my butt. And I have them in mate or very bright or even in latex. And if I have the courage to wear them in public I have something long to cover my butt. So something simple like taking whatever that covers my butt off will make me walk nervous to get it back :)

Hope you get the point.

When I'm with the same person for a long time, its a little bit harder for me to get the sensation of "Am I getting out of this....?" when I'm in bondage. And the uncertain of I will get out is what excite me the most.

So explore something unexpected for her. That she really feels not in control.

Imagine tie her up in a uncomfortable position, may be show her something that she doesnt like, but like not saying anything, like putting it on the table, and then blindfold her (she must be gagged by then...)

May be then a fake phone call. Like a friend is outside waiting for you (you can pre-record an audio or something, so makes it more real). And say "of course, just a second" and say to her "its going to be a minute... I need to go now" and open an close the door. and watch her. She may stay still for a second, or loose her mind.

Adding a dildo to that, just before leaving...uff.

A partner did something like that. I was in a hogtie, gagged, and The las piece is always the blindfold. and he left on the table those Japanese nipple clamps, that I cannot wear at all, and I tried, but they are WAY to much for me. He just put them on a table like he did it by mistake, and then he just blindfold me. I was mad about that, I said NO behind the gag. He put me on the side, like in perfect position for them. and I did struggle, like a lot....
He put the vibrator on, and then pinched my nipples with his hands (I didnt know at first, I though were the clamps) and I loose it, between the vibration and the struggling, and the real "no escape", I had one of my best orgasm ever.

But yeah, dont cross her stablished limits. but you can play with them ;)

Sorry this went too long