Looking for a threesome story

[sammi427]

The story I'm looking for was about a husband and wife. The husband wanted a threesome to spice up the relationship. The wife, insulted, comes up with a plan. She agrees to the threesome, admitting the relationship could use some spicing up and she doesn't want to be guilty of not helping. To the husband's surprise, she brings a guy to have a threesome with. The husband tries, but can't really back out because it was his idea.

I'm getting wet just typing the description, please help!

Thanks,
Sammi