well done with this!

you pack a lot into a thousand words. The set up is uncomplicated and the betrayal nicely done. when this draft is complete I would imagine you'd want to make this three or four chapters to introduce more characters and background (eg, seeing how her work is affected & why she happens to have such powerful sedatives)

Re: the sedatives, can I suggest considering a different delivery system? left over dinner feels a little hit and miss. some folks aren't keen on left overs, sometimes they get put in the fridge and then, a few days later, disposed of.

if the sedative were in a beverage (orange juice?) then you open up the option of one of them falling asleep while driving and them dying in a car wreck - the drive can also have been set up with the phone call with her friend.

anyway - great start - looking forward to reading more