DH's mum and dad gave him some birthday money last week in an envelope to spend on a treat.
DH put it in a drawer where he often keeps cash from selling things on Facebook marketplace. He has encouraged me to take cash from that drawer to use when I go for a haircut (as they prefer cash to card).
I took the money from the drawer to spend on a haircut. I forgot that it was the money from his parents rather than some other money that he wanted me to spend. It was an accident and I have apologised and offered to get some more cash out.
We have shared finances and DH's parents are still alive and well.
DH was sentimental about these particular notes. He wanted to spend them doing something fun and think of his mum getting the money out of a cash machine for him. He spent about 10 minutes talking about this last night and I kept apologising but ended up crying.
I could understand if it was a special coin from a deceased relative that he never wanted to spend, but this was some notes from relatives that are still alive and well and that he was planning to spend.
I think DH is sentimental to to the point that it is too much. We have a long history of similar incidents. He thinks I am a bit of a robot as I am not so sentimental.
AIBU to this his sentimentality is not normal?