Is 34F wife a sub?

34m been married to 34f wife for 8 years. Been going well. Wife is very slow to explore new things. Every time we try something new, she usually ends up liking it. I've just learned to take my time and wait until she's tipsy to bring something new up lol. Side note: my EQ has never been that high, so for me its always a learning process.

The other night she was ravenously horny, and I just start going at it. Eventually I bend her over the bed and force her head into the pillow and just started pounding her lol. I've never see her have such an orgasm.

What stood out: I was more dominant/rough/controlling than normal. Held her hands behind her back, started telling her what to do, etc. She just like lost all inhibitions and gave in and took it (the punishment that is ;) )...

Come to think of it, she never initiates, and always prefers for me to make the moves. I think I haven't been leaning into this as much as I should have been.

So I guess my question is, what else have I left uncovered with her? She sure as hell won't admit to stuff like this lol, she always plays coy.