Firstly, tell her underpan must be hand washed. Then ask your maid to explain whose the underpan belong to. If she said the underpan belongs to her. Ask her try it on to see whether it is fit for her. If the underpan is to big for her, You know what happened.
Man's underwear has a bigger "褲浪", how come a woman can believe it is more comfortable!! No way!!
Accept the fact that the underwear is not belong to your maid. You must fire her immediately, I wonder she will get pregent very soon.
If her boyfriend really go to your home and leave this underwear to your maid, then you can imagine the terrible scence that the maid had "make love" with this man in your bedroom and change another underwear or without an underwear when leaving your home.
我鐘意你同我講 I Love U, I Love U Too!
You are the sunshine of my life. That's why I'll always stay around. You are the apple of my eye. Forever you'll stay in my heart.