Be prepared to spend more than a week in Prison. Looks like your brains are situated in your cock. What you are thinking is not only foolish but criminal.
Do you think Maids are there to satisfy the sexual urges of Boys who have no control over their Lust. It would be less problematic for you if you visited a Prostitute, paid her charges for a week (some of them charge by the hour) and then indulge yourself till you can fuck your brains out.
I would have understood, if the maid gave you some “Come fuck me looks”. All she asked you, if you needed something when you went to the kitchen. That I think is normal conversation and strange that you are attaching some meaning to that.
Most Maids are worldly and they understand what you want. They also know how to screw you with their little finger. They love to gossip and you can imagine what a wrong step from you would mean. I have just written an Article on Flirting. Pick up some Tips from there. Instead of investing in condoms, buy some red roses and some creamy chocolates or if you can afford it some sexy lingerie.
If you cannot afford these things you can always borrow money from your friend’s parents and tell them why you need the money. In any case they will not take long to figure out about your plans and maybe not only throw you out from the Job, but also from the house.