Let me be clear here @Keem there is NO SITUATION when it is OK to joke around with or talk about what you did, to anyone you do not know will except it as you intend it.
To be smarter with WHAT you say, WHO you say it to, HOW you say it and WHY you are saying it. Assume everything you do in game, in TS, on the internet is being watched and could be recorded.
I do not know how well you "know" her, but from my limited conversation with her about this, it is not a "know" as you believe it to be.
TS conversation, Out Of Character talk are still subject to regulations, codes of ethics and good judgement and you failed in all three aspects.