Whenever you go to her house for some play time, pack a small bag and leave it close to their house somewhere.
In that bag should be the following items:
A pair of underwear
A pair of pants
A shirt of some kind
Some socks and shoes (preferably running shoes)
spare keys to car and house
$20 or more
Why do this? Cause none of these things are within reach when her husband comes home unexpectedly.
Running around a neighborhood naked, is a sure fire one way ticket to the jail.
Plus, a good shooter will take out those nuts for you.
If she is at your house, keep a loaded pistol next to the bed and deadbolt all the doors.