To ask if you think I was rude?

[oldwornstuff]

Mortified if so.

Took my DS (16 months) to a swimming class this morning. We normally go to a different one but he was unwell last week.

A woman was there who was in the same swimming class when DS was a baby with her DD. I greeted her and she seemed pleasant and smiley.

in the changing rooms I went, said goodbye but then realised I’d forgotten something so went back in and heard her talking about me to her mum saying ‘she was so rude when I invited her to (DDs) party.’

I looked back through my messages and she did invite us to a party which was run by a baby sensory lady. I had replied saying ‘thank you for inviting us but we are busy.’

Was that rude?

From what OP has described she has probably inadvertantly created a situation where she had a lucky escape from being tangled up with someone very needy and dramatic with little sense of perspective. I'd count it as a win, OP!

Yep.

You weren't rude. How were you to know that she expected more than you wrote? Some people just want an excuse to be offended.