He said: “Not a day goes by where I don’t question why. Why would he do that to her? All my mum ever did was love Tristan, she looked after him and put up with way more than anyone ever should have, but that was my mum – she would do anything for us, anything for him, she’s the only person that’s ever done anything and everything for Tristan his whole life and he’s the one who’s took her from us all.”