Poly and kink

One of my partners and I (let's call her Celia) like a somewhat kinky dynamic where I am more toppy and dominant. We're both women for what that's worth.

Recently when I see her after it's been a while and she's been with other partners, I get deep into that top/dom headspace. I feel possessive and rough. Breeding kink etc.

She's liked it so far, but this is new to both of us and it's ramping up. It feels good in the moment but I'm not sure whether to lean in.

She and I play with power exchange more heavily than either of us have before. We're working out how to talk about it and what it means for us.

I'm seeing her tonight and I'm fantasizing heavily about it, but the intensity of the fantasy is scaring me a little. I don't know if it's an expression of jealousy? Is it healthy? How do you handle these things?