AITA for outing my old friend?

I genuinely feel torn about this and I would accept whatever verdict I get. I'm using a throwaway and fake names for obvious reasons.

I (35M) have been best friends with Harry (35M) all through my childhood and got to know his younger sister Melanie (33F) over the years. We were never close but always polite and friendly. I still am very close to Harry's family which is why I know his sister Melanie is married to a woman (Anna - 30F) and has a son (5M).

I recently started working as an RN in the same hospital as Melanie. She was and has always been polite and friendly. Due to us being close, a few coworkers asked me where I knew her from, because apparently she is usually much more formal with people. I explained. And also mentioned that I was even at her wedding and she was in mine (as in that's how close we are). Then they asked what her husband did for a living and I said her wife is an interior designer.

Melanie later pulled me aside and asked me not to share any details about her at work. I was gehuinely surprised because I didn't share anything personal. She explained that as a 'girly looking' Orthopedic surgeon she already is behind all of the old men she works with by a long shot, and that knowing about her sexuality will make her work life only about being teased and joked about by those 'jerks'.

I said if she thought this would be a big problem, she should have warned me beforehand and I would absolutely not mention anything. It is especially weird to me because she's been married for 10 years and has a kid. She said she just expected me to know her better after 25 years but was sadly disappointed.

I don't really know what I did here. I had no idea. My coworkers are mostly nice people. Most of them are on my side but some think I shouldn't have talked about Melanie at all. I am not asking you for your opinion. Was I indeed ta?