Small bit of work advice - do I go to my boss about this?
I got invited to a Teams call today by a colleague I'll call Y, a technical one for an upcoming event (I don't really do technical stuff, so bit perplexed, but stayed to be polite). Gave our boss an update after the call as she is on a work trip. Boss asked why I was even in the meeting, and I said I was confused too, but had a question to ask her anyway that came from the meeting and she gave me an answer. Told colleague Y the answer (it involved follow up) and I asked colleague Y if she's happy to do that or if I should and that task should be managed by me going forwards - I outlined this task hasn't been under me previously so I'm just checking to see if it is this time. Her response was 'well it isn't in my job description' so I said 'no problem, I'll talk to our boss'.
A bit later, my boss told me she told colleague Y to not invite me to technical calls from now on as there's no need, that our roles should remain as they are. I said thanks, happy with that my end as I'm busy enough with what's on my plate.
About an hour later I'm in the break room and colleague Y asks to speak to me. She does so in front of our CEO and deputy CEO's offices, who have their doors open and can clearly hear. She asks me 'why I said I'd be happy to do a task if I'm not'. And I said it's absolutely not about not wanting to do it, I just wanted to make sure that I understood my role in the event and that nothing slipped through the cracks by me missing something being under my care. She kept on getting really quite close to my face and insisting that 'if I have bad feelings or tensions I need to tell her to her face' and 'be honest if you don't want to do something' and I was just... perplexed. I kept trying to give her a way out and diffuse the tension by saying I know I ask plenty of questions, we're a newly merged team and I'm just making sure I'm not missing anything, genuinely always happy to help where I can - even if it's pointing someone to the right person. She could clearly see it wasn't really going anywhere and ended it all with 'well you just shouldn't say you're happy to do something when you're not' and walked off.
I could tell she was still pissed off, but it felt really quite aggressive. She's also junior to me (I'm management, she is not) and doing it in front of the CEO's office felt deliberate. I feel like I'm unsure of two things here:
1) should I tell my boss, who returns from her work trip tomorrow, what happened?
2) did I do anything wrong here in how I handled the confusion?
Sorry for the long post!