Is OTHER wrong in the post ? POST :  My sister is high-risk pregnant and just moved houses. Her baby is due in a few days, so when she asked me to paint a mural on the nursery it was go-time. She wanted [mountains](https://i.imgur.com/XosK7eI.jpg) on one wall, and birch trees on another. Now, my sister's mother-in-law(SMIL) normally is the go-to artist in the family and I think this is why things went wrong.

My sister provided paint, but the top two blues were too close in color. I mixed them with white and a darker blue to get them to contrast a bit better. Every other range is base color. After 10 hours the project is done barring a streaky spot at the bottom that needs to be filled in-we had run out of paint. She had posted pictures of my work on facebook to help promote my budding business and I got a lot of nice feedback/inquiries.

SMIL also painted rainbows on my niece's wall, but had stated she didn't want attention, so she didn't get a FB post. She also left a somewhat bitter comment on mine, so my sister messaged her to tell her that they appreciated her work, and that my niece loves her wall. SMIL responds with how she was exhausted from the work, it took a lot out of her, it's unfair, and how she feels taken advantage of but does painting because she loves her family.

The next day my sister calls me up crying. It turns out SMIL was over to help with last minute things and had snuck upstairs with the paint. She filled in the streaky spot, then began "touching up" my mountain ranges--the range that I had mixed paint for, and used the paint straight out the can. When my sister caught her she flipped, and SMIL panicked and tried to wipe half-cured paint off the wall stripping it down to the raw white bottom, effectively ruining the piece.

Over-stepping boundaries has always been a problem with SMIL. I **don't** think she was trying to ruin my piece. I think she was trying to play the hero ("I fixed some mistakes Readylamefire made!") and get involved in something that didn't belong to her. The portion she was 'touching up' was a part I had gone over with a fine tooth comb because I knew there would be no second chances on it since mixing the exact color again would be near impossible. My sister demanded she leave but she ignored her, continuing to try and fix it. Now I have to go actually fix it.

Now, I have a right to be mad, but here's where I think I might be the asshole:  
I want to send a firm worded letter to SMIL. She constantly does stuff like this. This was my first time doing something like this for my family, and I worked really hard. She had no right to start trying to alter the work I had done. It meant something to me. **However if I do send something to her, it'll trigger drama, and my very pregnant, stressed sister will undoubtedly be caught in the middle.** It's the one thing holding me back, and I'm leaning to being the bigger person/not saying anything to SMIL at all.