I'm 32 years old and 7 wks pregnant with my first child. I am unmarried but live with my boyfriend/fiancé (he's spoken to my parents and asked for their blessing but hasn't asked me yet, although he has a ring lol). I'm super nervous about talking to my parents and letting them know that they will become grandparents in February. They aren't super religious but they don't like that I'm living with him before being married. I feel like it would be a disappointing rather than an exciting conversation. 

Advice on how to start the conversation would be greatly appreciated