No what you need Op is a glitter bomb inside a carrier bag hidden in the fridge (and obviously teddy cam to film in all its glory). She will be so raged that yet again somebody has used HER fridge that shell open the bag up to see whats inside and poof, glitter all over her nylon workwear!
Then the next day hide on in her shopping, then in her desk drawer, then find which her fave toilet is and stick one in there and await her to go she'll soon be taking time off with stress from glitter overload and fridge will be yours.
Alternatively and something id probably do, buy some of these and carefully peel open her meat and place a few inside, perfect for a full chicken, or slice open chicken breasts and stick a few inside. Imagine the horror of watching her precious angels tuck into the chicken casserole she's just dished up and a few jelly shaped dicks explode out.