Apologies for the rambling thread title but couldn't think how to put it succinctly. Have also name changed for this.
I am a single parent with primary-aged DC. The other week we went on holiday with my parents to a caravan. On the last evening we went inside and I was stood just inside unlacing my shoes, with my hand resting on the edge of the wall - except it turned out it was the edge of the door, and as my mum came in she shut the door hard on my fingers. This trapped three of my fingers on my hand, which was such an unexpected shock and pain that I literally screamed in agony. I was stood nursing my red/purple fingers with dents in and I was shaking with the shock and pain of it and feeling a bit sick. Clearly it was an accident, but instead of saying 'Oh I'm so sorry, shall I get you some ice' or something like that, my mum threw a massive wobbly, stormed off into her and my dad's room, threw herself on the bed and started sobbing. I was a bit surprised at the over reaction to say the least, and could hear her saying things like 'I can't do anything right', in between sobs. My dad went in and came back out within a minute - he said she was saying that she knew she shouldn't have come and he's hardly spoken to her all week and other things like that. Clearly nothing to do with my trapped hand.
So after a few more minutes my dad went back in and I went in too. She was going on about how her mum had probably been right, she should have listened to her as she never wanted my mum to marry my dad, that she probably shouldn't have married my dad because he's too quiet etc., all while my poor dad is stood there wondering WTF is going on, as am I. I said if they have issues they need to talk and sort them out, and she was saying how he won't talk about things etc. My DC witnessed the whole thing btw.
Thing is, after that it was like there was an elephant in the room because the problem is they don't really talk to each other in much depth, it all seems (to me as someone who no longer lives with them) to be very superficial between them. The whole incident was all kind of glossed over and when I was packing to come home shortly after, my mum came into my bedroom and started telling me all about how she feels they've drifted apart and how they don't talk etc. I just said if it's that bad then see a relationship counsellor, because I didn't know what else to suggest. Also I know this is going to sound heartless but I've got enough of my own shit to deal with (on waiting list to see a counsellor etc). Nor do I want either of them thinking I'm siding with the other person and I don't want this to affect my DC.
I'm not sure if trapping my fingers triggered these other feelings/issues she's having about her and my dad, or whether this was my mum deflecting away from me, because quite often when things happen to me (good or bad) she makes it about herself, or she'll have done it better/more often/was more ill, or will know someone much better/worse. It's almost like she can't acknowledge me in my own right, iyswim (and I know that doesn't make much sense!). I could be reading way too much into this though, I don't know. I do know, however, that I'm unsure where to go from here because you can bet your bottom dollar that this whole thing will be brushed under the carpet and never mentioned, so what do I do now? Do I mention it and ask if they're ok, or do I just pretend it never happened? In case it's relevant, I'm in my late 30s and they've been married well over 40 years.