Hey guys, I’m a little lost in terms of whether or not I’m being a jerk by getting slightly upset in this scenario.  Please let me know AITA.

I am a 27 year old woman and about 6 months ago I got out of an abusive relationship, got clean, went to rehab, and dramatically changed my life for the better.  When I got out of rehab my dad (D) and my step-mom (SM) convinced me to move in with them so I am not alone and so they can ensure that I do not relapse.  

My D, SM, and I have never had a great relationship but things have been far better than the abuse of my childhood.  I am very grateful to live in their home, have offered to pay rent (offer declined), and try to help out as much as possible (shovelling snow, laundry, dishes, etc.).  For the most part I put my feelings or wishes aside in an effort to maintain a peaceful home.  Recently however a situation has occurred which has been irking me.  

The room I am staying in was designed for my sister when she was 8 years old and is painted baby blue, decorated with picture of flowers, rainbows, angels, and stars.  The colour theme is baby blue, green, pink, and orange.  It is not my style but I’ve been ok with it given that it is not my house to dramatically alter.  

That changed last week when our cleaning lady told me that my SM thinks it’s funny that I’m stuck in this childish room and that she plans on making it into a proper, neutral, adult guest room once I leave.  This upset me significantly as I’ve asked before if I can take down the childish flower power paintings and angels and put my own bedding on the bed and I was told that the room must stay as it is until they sell the house in a few years.  

Then today my SM told me she and my D are cleaning out their basement and asked me to go through some paintings and photos to see if there is anything I would like to keep.  I selected one painting and asked to keep it.  My SM said that was cool but that I should take it to my closet or storage locker.  I asked if I could hang it in my room where the three “flower power” pictures are hanging.  I mentioned that I would not have to put any new holes in the wall and that I could keep the flower paintings in my closet so they can be put back up when I move out.  My SM told me that it would be ridiculous for me to change anything in the room and that she walks by the room sometimes and wants to see it as is if she glances at it.  

Am I out of line for wanting to make this space a little more comfortable?  I would not be throwing anything out (and would safely store the childish decorations), would not make any new holes in the wall, and would only use things that I already own and have been keeping in storage.  I am very grateful for the place to stay,  so AITA for asking for this change or should I just keep things as they are?