Cousin gave me blowjob

A little bit of context and background.
We are first cousins – at the time it occurred (over 10 years ago) I am Male (15 at the time) and she was Female (16 at the time)

We slept in bunk beds of the same room when I went to visit as we lived in different cities.
I would sleep on the top bunk and she was at the bottom, during one night she said come down and hang so I did, she told me to lock the door and I started feeling up her breasts and sucking on her nipples as she moaned, then I fingered her (first girl I fingered by the way) and she would moan. She would go topless and go down under the blanket covers and suck my dick. She said not to cum in her mouth, so I asked where do you want me to cum, she said do it over my tits.
I would then basically go ontop of her sitting upright while she was on her back while topless and I’d masturbate until I would start cumming all over her tits and then I’d help her clean up all the mess and I’d go back up to the upper bunk and sleep.
This would continue basically every night for about 2 weeks until I went back to my city.
Looking back over 10+ years when this happened, her and I are quite close and talk a lot, we probably spoke about the incident 1-2 times but we never talk about it.

I’m not sure if I regret any of it because I enjoyed it, but I’m not sure whether she enjoyed it or if it’s something she regrets doing. Is it inappropriate to ever bring it up in a conversation with her?
Was it wrong what we did? Or were we just young, horny and naive?