If you spray it down with bleach (1/2 water, 1/2 bleach) that will kill any mold left.

Just spray is on with a pump sprayer, wait 10 minutes, and rinse with a garden hose.

Ok before I went on vacation I was at the house unclogging the sink, the house was a dizaster pencil and crayon markings on every single wall in every single room and hallway, the privacy fence had spray paint all over it, the deck had the same spray paint where her kid was spray painting his toy guns, there was a mattress leaning against the fence, a mountain of trash, door handles broke in one of the bedrooms, grass hasn't been cut since she moved in. 

We completely sprayed the entire 1st floor with BIN and inside the floor joists before putting down new sub-floor.

They just spray the heck out of every wall and ceiling in the houses out here.

It is not a big issue you first wash the area with shampoo because it will remove the urea salt which is making the odor after that apply the chemical odor removing spray which is easily available in the market.

The floor of a two car garage from a recently vacated home has a good bit of black spray paint overspray on the floor.

Clean mountain air and ocean spray.

If you plan on having internal combustion engines of any sort in the garage below, don't skimp on air sealing the garage ceiling and walls {this is where closed cell spray foam insulation is very useful}.

I'm thinking maybe spraying something under the sink and sending a text to her (so it is in writing).