Hi Sotto, ok , quick story of what happened a while back, i was chopping some trees with my chainsaw, i had sent S18 to get something and i didn't expect him to return so quick and as i turned around the chainsaw tore through his jeans but didn't touch his flesh.
I had nightmares for weeks and it still gives me the shivers to think about what might have been. My thoughts on your mum are it could have been worse BUT it wasn't. Accidents happen and it can be used as a reminder to be that be more careful. I dont use the chainsaw with anyone within 50 feet of me now.
We all know what a caring soul you are and your real or perceived lapse re your mum happened and treat it as a lesson.
're your sister , we can only control ourselves and hopefully infulance others by example. Focus on all the good you do for mum and dad and others.
2018 is hours away, put this behind you and look forward.