She should use the suction cup of her dildo to attach it on the mirror. Once done, let her fuck this way 30 times.

Fuck dildo on mirror

Having you ass fuck yourself on a suction cup dildo attached to a mirror, well, just doubles the visual enjoyment...

Use the suction cup of your dildo and attach it to the mirror. Now look at yourself as you fuck yourself 30 times on that dildo. I want you to see what a slutty girl you are!