Maybe the typical gay "situation"?

[OrphanPip]

I would say it depends on your situation, if you are capable of being independent from them, then you don't have much to lose from being honest. If you are financially dependent on them, then it can become very hard on you. The upside is that I think even most parents who react badly eventually come around in time. My mother does not handle it well, she does not approve, but our relationship is civil if not ideal.