Anne Giddings, 57, from Wolverhampton, said losing sister Jill, 49, and niece Kirstie, 15, is “more than I can bear”.
She added: “There’s nothing worse. I’m shocked at what that monster’s done. Who would do something like that to innocent people?”
One of the pictures shows Kirstie laughing with a pal. Christopher, 50, shot her as she chatted to friends online, then killed himself in his mansion in Maesbrook, Shrops, last month.
His mum Enid Foster said, 78: “I can’t condone what he’s done, but I’ve lost a dearly loved son, daughter-in-law and a beautiful granddaughter. He talked to nobody, we knew nothing about his financial situation and it’s come as a tremendous shock.
“So many of his friends have told me that, had they known, they would have helped him however they could.”


