So, I visited my boyfriend's family for the first time on Sunday
His mum cooked for us all. Lovely meal. When I arrived, I came with a bottle of lemonade. I said this to his mum ''I've got this, can I pop it in the fridge? Please help yourselves''
When having dinner, I asked for a glass (there were only small wine glasses on the table).
His mum said 'but we're having wine?'
I said no thanks, I'll just have some of the lemonade please'
She seemed really 
at me!
We had a nice meal and then my boyfriend mentioned to me today 'Mum was really confused about your lemonade! Maybe don't do that next time 
'
AIBU to think it's fine? It wasn't just for me. Anyone could've helped themselves but it was so strange. It was as if I had placed 10g of coke on the table and told everyone to help themselves to a line
Very odd indeed surely?