Be loyal, or be in deep doo-doo, goes the message of many of Grimms' Fairy Tales. It doesn't matter what you think you stand to gain by betraying someone, or whether it's just hilarious to stick it to 'em. Disloyal friends and siblings are lucky to get away only missing a few body parts; mostly they're just killed. Sometimes lovers or spouses are enchanted and forget each other, and that's usually worth forgiving. But otherwise? Don't risk it. We don't recommend even making catty comments about how that dress totally doesn't match those glass slippers.
Love conquers all…or does it?
You're in deep. The best back-up plan you could have in a fairy-tale "oh crap!" situation is a loyal friend, not cleverness, beauty, or goodness.