When Eddie is walking through the house following the motion sensor alerts that the drone was causing, it would have also shown him where she was and where he was at the time. Not just the drone.
The mother is constantly barefoot. But when she returns into the woods to see the guy she knocked down during their fight you can clearly see she is wearing shoes all of a sudden when she kneels and starts to talk with him.
After Shaun disables the circuit breaker box, the power is shown restored in minutes. But it would have taken a trained electrician hours to reconnect all of the breakers she dismantled.
Both Glover and Jasmine are said to have never been at their grandfather's house, which is large. Yet they both seem to be very familiar with the layout.
When she is caught she is barefoot, but when she returns to the house she removes shoes and socks. It is later shown that Peter is barefoot thus revealing Shaun has taken his shoes and socks.
At 35:16, when Maggie's dead body is pulled inside the house, she lifts her legs so they aren't dragged over the threshold.
The house is deep in the woods, miles and miles from a town or city and yet she calls to have a pizza delivered.