Cutthroat Kingdoms releasing from AEG in 2017! Get Med-Evil!
"Let tidings of fortune reign upon your house for a hundred years."
I'd recommend it as a house rule that a bastard can be used once per round. You can present this as a deal to all players at the start of the game and have a group handshake on it, though then it is subject to the deal breaker card.
This is a completely acceptable solution! The game was MEANT for house rules, so you can certainly do this without breaking the game, and making it less painful for other players. This is a wonderful thing to do.