funny joke

A man arrives home from work one day, goes into the sitting room and finds his wifes sister spread out across the sofa wearing nothing but sexy lingerie

"ive been waiting for you to come home, i just wanted to tell you that i really fancy you and i want you to take me upstairs and f**k me hard" she said

At this point the man turned on his heel and ran out the front door as fast as he could, just before he reached the car his wife pops out of a bush at the end of the garden

"oh honey i thought i couldnt trust you, i asked my sister to do this to see if you would cave in and you didnt, you are such a loyal and wonderful man" the wife said

Moral of the story, always keep your condoms in the car