Is NOBODY wrong in the post ? POST : I commissioned a painting from my sister about 2 years ago. I paid for the piece and all the supplies before she started working on it. Last month my sister texted me asking if I was available because she was going to come over with the finished painting, so we organised a time for her to arrive and we could have coffee and she could give me the completed piece.
So the day rolls around and she comes in with the piece and it’s not finished, she’s only painted the background (and not the way I asked) and she has only just started on the lettering (also in a different style than I had asked), so she spends the day over and I have an exam the next day which I was stressed about, but I try to remain civil, while she uses my garage to finish it off. But she doesn’t finish it and she left it in my garage, I get a bit drunk a couple days later and spray paint over this painting in a fit of anger. I haven’t told her about it yet. 
Also to add context my sister and I don’t have a great relationship and me commissioning the painting felt like me extending an olive branch.
Am I the asshole?