Not sure what is ok and what isn’t

Hi all
I’m posting here as a bit of a beginner. To give you some background, my partner and I (I am 34 she is 32), met almost five years ago. We had a very vanilla relationship up until about two and a half years ago. At the time we discussed our sexual fantasies and discovered we both wanted to play with domination – more specifically her dominating me in the bedroom. We found that the best way to express and explore that was with a strapon and various other toys as well as positions such as the amazon position for her. We also got into talking during sex.
This side of our relationship really grew and brought us closer together. We then moved in together and continued exploring. Last year we started seeing another couple but without really showing them our femdom fantasies.
Since we moved in, I noticed my girlfriend had become more and more assertive. She had been the one to find our appartment, and had taken many of the major decisions. She also earns a lot more than me and at first we used to joke about it, then we integrated it into our sex talk and domination fantasies. Gradually, she came to fully dominate in the bedroom and I was very rarely the penetrating partner – we almost exclusively used the strapon.
Up until this point I was absolutely fine with everything. And then I began reading about FLRs and decided to bring up the concept with my partner. She agreed it was definitely somethign we were already on the road to. So we decided to create some ground rules. She took full control of our major decisions and I was assigned most of the chores. We also decided to speak to the couple we had been seing about our fantasies. My partner wanted to see if we couldn’t mix the two. Whilst the man in the couple and myself had never actually had sex (only swapping with our partners), they both revealed they liked the idea of him dominating me with my girlfriend. This rapidly lead to all three of them fully dominating me.
Now it’s been a year and we have progressively been building on both the non-sexual aspects of our FLR and the bedroom side. She now manages our finances, decides what I wear, when I workout and what we eat as well as manages our social life. Our closer friends are also aware of our relationship.
In the bedroom, it’s much the same, only we have now begun exploring cuckolding. Outside of the couple we still see about once a month in which I mostly watch and please when asked, my partner also sees another man.
This is absolutely all fine with me. I am so much happier since I put the decision making in her hands and love our sexual life.
However last week my girlfriend sat me down and revealed she would like to take things a litle further on two points:
She would like for me to switch to female clothing when at home and she wants me to begin seeing her lover one on one. She wants us to film our meetings and show her.
And this is where I’m unsure. Firstly, I’ve tried female clothing on before and regularly wear lingerie with my partner but I feel like fully dressing as a woman would be a step too far. I’d feel ridiculous rather than submitted.
And secondly regarding her lover, I’ve only met him once and I felt no attraction. Exploring sex with a man in the context of the couple was exciting for me but it was because it was with her. I’ve found I’m good at pleasing a man but I’m not sure it would work out one on one.

I tried bringing this up with her but she said her decision was final. I’m not sure what to do.