Sounds like your mum might have quite a lot of insecurities herself? @creative_writer ?
When you said you saw your mum look upset so you stopped talking, it reminds me of me previous 'avoidant' behaviours. If something was upsetting, I'd avoid it.
Over time, I've worked with my therapist to face some of these insecurities by being okay with sitting with not knowing. Also, when you saw your mum was upset, did it ever cross your mind to say "I can see you are upset, what is making you upset?" - I found this so hard to say at first. but now, whenever something unpleasant happens, I push myself to say such things so that it can put out on the table and the upset doesn't have to eat me up inside.
Am I even making sense? I don't know...sorry if i'm confusing you.