We live in a building of flats which have communal gardens front and back. The back is much bigger and more for recreational use and the front is more of a flower bed type garden but still a decent size. To get to the back garden we have to walk around a street and use a key so it's not very convenient. Myself, DH and DS (2) live on the third floor and since lockdown we got into the habit of watering the flowers in the front garden. This was initiated by the communal gardener who got DS a watering can etc.
We do it probably 4 or 5 times a week, for 10 minutes a time. DS likes to fill up the watering can from the hose pipe and it's a sedate activity where we enjoy looking at the flowers but by no means make much noise or anything like that.
The hosepipe is directly by one of the ground floor flats windows. This ground floor flat doesn't have direct access to the communal garden but their window from the kitchen/ living room looks out directly onto it. This flat is occupied by a single older lady in her late 70s and we have always had a bit of a chat and been very friendly and she chats about DS etc.
This morning DS and I were in the garden for approximately 10 minutes just after 8am. We thought no more of it. This evening as we were coming in the neighbour came out of her flat very angry and exasperated and said that this morning was ridiculous because she was trying to have her breakfast and look out of her window and we were "right there". (I did notice this morning that she shut her curtains as we came into the garden.) She asked us to stop playing in that part of the garden but from the off was quite aggressive. I said I didn't ever realise this was an issue at all and she barked "I'm telling you right now it is!" She said it was ridiculous that we were so close to her window.
The issue is that's where the hosepipe is for filling up the watering can plus all the plant pots. Previously she has always come out and thanked DS for watering her pots saying it saved her a job so I have no idea where this came from.
I said to her that I was sorry she was upset but it's a communal space and she was very agitated. DH then arrived home and asked what the problem was and she was shrieking a bit and he told her "it won't happen again", but I'm annoyed as it's not her right to tell her we can't use that part of the garden.
I walked away and got quite emotional because all during lockdown I've struggled living in a third floor flat with no private garden and this is one thing DS looks forward to each day and asks to do, and this previously friendly neighbour suddenly became hostile and has spoilt that for him.
Who is being unreasonable?