Will this come back to bite me in the bum?
The other person is kinda right, the setup in your pic is beyond horrible for nesting. Ackies perfer arid soils, silty sand etc, with no plant matter.
After that you are going to have to get lucky and yes luck does happen, so I hope you have some. Also 12 inches is MINIMUM at best. And if its in only part of the cage, your toast and so is she.
Ackies are not beardeds, that is, they dig a burrow, then nest at the end of the burrow. The burrows in nature can be 30 or more feet long. But that is not needed in captivity. But they do make burrows. A burrow must be longer then the lizard. Several times longer.
Also consider, 99% of all healthy female varanids posted on this board, DIE from reproductive complications. And that includes females kept by experienced breeders.
So take advice and do not expect success because you have a gravid female. With monitors, that is the easy part, its the rest where the problems occur. Cheers and I hope your monitor gets a pat on the back, if fact, I hope she survives. Cheers