Hi all! Tldr I'm looking for a hands-free clit vibe that my partner and I can use during sex. Any recommendations?

I started seeing someone new and she can only cum if she has a vibe on her clit while being fucked. We like being close together for lots of physical contact, but it makes it hard for her to hold one against herself. She needs consistent pressure in the same spot for an extended period of time to cum. I tried a vibrating cock ring and, while it did make her cum eventually, it moved around a lot and pressed up against her uncomfortable/painfully if I hit the wrong angle.

Given that, here are my ideal requirements in order of preference:

1, Hands-free

1. Stays in whatever place you want it for an extended period of time

2. Low profile or softer surface, at least where it would hit the clit

3. Different vibration strengths (doesn't need to have patterns)

Thank you for your collective wisdom and experience!