Asking wife about kinks

My wife and I have been together for 18 years and have a great sex life.

I have always been the one to experiment in the bedroom. I LOVE to try new and exciting things, I thoroughly enjoy sex and the closeness it brings us.

I get off on watching her get off so when I say I would I would do anything she asked... I would literally do anything! Now, she is pretty vanilla and I'm totally happy with that, but everytime I push her a little out of her comfort zone she really enjoys it (dirty talk, anal play). We talk about it of course.

My question is this what sort of kinks can I bring up that wouldn't be too outrageous and scare her while still pushing things a little? I'd love to talk to her about this but want to make sure I dont make her feel uncomfortable, so maybe some light fun stuff. I was thinking some activity where there's a small chance of getting caught or some butt plugs and DP stuff since she enjoys a little anal play already?

Any thoughts would be great, just looking to have little fun :)