Ok I'll give it a shot:
1. To do this, you will need a mask, a small hand-held mirror, and a kamasutra manual.
2. Wear your mask and go to her room.
3. Walk with your back facing front when entering her boudoir. This is where the mirror comes in handy.
4. In fact, to be doubly safe, keep your back facing her at all times and use the mirror to communicate and enjoy the view, shower together, etc.
5. Use one of the "facing away" sex positions like the ones in
this article. Or something like this:
3_42_4.png
6. Make sure you wash your hands thoroughly upon leaving the premises.