dog and blue tongue lizard and redback spider

dog was outside (for a change) making a fuss around the side so i figured i knew what the bark meant.!!!
another blue tongue lizard..... which appeared to be  under an old cover in the yard
i got her out of the area but she came back...interested, concerned and a cross between frightened and curious

i carefully took the cover off the ground.... and this is what we had.........what looks like a very  pregnant blue tongue lizard

we left her alone as she was getting very upset and running at son and being somewhat unfriendly.
a short time later son moved some bricks stashed against the fence and there she was.

however the eggs belong as far as i can figure to a red back spider which my son had seen just before.

i had a think about it and decided that given the amount of bricks, the number of eggs inside some other bricks , that i was going to kill them.
i couldnt spray because of the lizard being hurt and the babies being injured when born.
so i did my usual spider thing and got son to stomp on the eggs we could find and i tipped boiling water all around.
however ..........most of the eggs had gone.
the question remains ......do red backs pick up their eggs and move them....or did the blue tongue eat them???