Why would my mom be happy about a "normal" sibling squabble? Because everything else was so "abnormal". My sister has severe disabilities. She has been diagnosed with sever (like, farthest end of the spectrum you can get severe) autism, cerebral palsy, and epilepsy. As a child and teen she was very abusive (towards herself and others) and our mom was constantly covered in bruises. She actually broke our mom's cheek bone once. Many people told my parents to write her off, to put her in a special facility. They never did and never would. My parents' strength was and is superhuman. There wasn't a lot of resources then, so our mom would come up with ways to adapt things for my sister. Her innovation is incredible. My sister needed a bed that was safe, but she was too big for a crib - so my mom and dad made one out of pvc pipes to fit a twin bed. They covered the pvc in large pool noodles and then our mom hand sewed strong mesh around every side. My sister would rip the mesh almost every night and my mom would sit there and sew it back together the next day. She also came up with pj's that she couldn't get out of but buying denim vests and jeans and sewing them together with a zipper in the back to make soft denim coveralls.
I'm allowed to say that because I'm her sister. She will be 30 soon and still lives at home. She is still as loud as ever but much calmer. She seems happier, more relaxed. That makes me so happy. There are still rough days and her health is slowly getting worse with every passing year, but my family is committed to giving her the best life we possibly can.
My childhood may have been different, but I wouldn't want to have any other sibling in he world.