Last week I popped into DS's dad's house to visit BIL and neice who also live there - DS went to his toy box and was playingwith toys in it when he stood up and said "what's this mummy?" holding an open set of pliers + pen knife! 
Obviously I took it off him and told him it was dangerous, not to play with it,
This weekend BIL went out into the back yard where DS was pottering abut on his own and DS had hold of a piece of bamboo and an axe, which he was about to chop the bamboo with that he was holding.

DS is 6, autistic, very young for age, no sense of danger, etc.
Ex was emotionally abusive and controlling. DS will no longer stay overnight with ex, he just downright refuses and says he will only stay for tea (and ex gives him hotdogs every single time - twice a week). Ex isn't natural with him, doesn't play with him, just sits him infront of Cbeebies, shows no interest in his autism (I've spent the last 2yrs fighting for diagnosis) I am getting more and more frustrated with the situation TBH.
Also, my dad (an alcoholic, abusive paedophile) is edging the peripheries of my life and has seen me with DS, I asked ex about 3 wks ago not to let DS play out without an adult stood watching him. His response was 'how long will that have to be for then?' (because it means him making an effort) He shouldn't be playing out alone anyway ex lives on a busy main road!. And it turns out he is letting him play out unwatched anyway! [ngry] 
My blood is boiling after typing this - AIBU? WWYD?