Mature couple on vacation meet lesbian couple

[Crios]

Looking for a specific story I ran into a while back. Pretty sure it was a Loving Wives story. Anyway, a mature couple are on holiday and they meet a lesbian couple and the man's wife goes off with one of the women to "shop" while the husband stays with the other woman who's actually bisexual. The bisexual woman tells the man her partner was going to seduce his wife. Story ends by wife coming back and telling the man they have to talk.