Is AUTHOR wrong in the post ? POST : Hello Guys, sorry English is Not my First Language and i am on mobile.
A little Context, i don't live at home anymore and get 100 % Financial Support from my parents, because of that and just being their Son, i still do a lot of things at their place, like all kinds of maintance and garden work. 
My Mother wanted to buy some new lights for her living room and i agreed to install them. Because of my exams she said i don't have to do them right away and they can wait. Fast forward, i got my Tools from Home and bring them to my parents. I did put them in the living room and said i would do it the next day. In the Morning i came for breakfirst over and saw all my Tools on the Floor. My two year old sister was playing with them. (Mind you i have Knifes and other dangerous things in there) I put the together and told my father, who was babysitting at the time, That this is Not OK and really dangerous. I didn't want to cause a fight, so i didn't tell my Mother, when she came back from work. 
After that i had to Go to University and came back late, to late to Change the lights. But i thaught next day is still a day. When i got in the living room. My parents there sitting with my sister on the Sofa and watching TV and i looked in the corner and all my Tools there lying around, even more than in the Morning. I was livid. But didn't want to scream. I put my Tools together and put them in my car. My Mother asked what is about the lights and i said that this not my Problem anymore.
I felt disrespected and  disapointed That my parents just Watch, while my Baby Sister was playing with dangerous Tools. 
I still visit my Parents and do all the other things, That are needed. But i won't Change this lights.
Am i the Asshole? 