Of course you let him/her free, coz you can't tie him/her up.

However, he/she is free to get a lover somewhere else, and you are free to move on.

己所不欲，勿施于人。You can't go out free as a happy little bee in the spring garden, but expect your better half to stay "faithful" to you, being the perfect model wife.

I know musician is better than that, you are just arguing for the sake of argument.:)