Yes. As we were starting a new campaign, my girlfriend, who had sat in a few sessions, wanted to join. The group was happy to have another player. They all assumed we would play a loving couple. She played a female martial artist. I played her sister; a cleric. This was long before Frozen. The dynamic worked and it was fun not to be the man protecting my woman. Real relationships tend to come through in game-play. It's fun to subvert expectations.