How will we tell them.

I’m waiting one more week to find out if I’m pregnant we have been trying for 11 months and we are crossing our fingers that this is our month.. but my SO family don’t seem to like me his sister has never met me.. the brother don’t talk to me when I’m around.. his mom thinks I’m just A selfish lover because I don’t work.. even after 4 years I can’t please these people.. I’m afraid of his relationship with his family after we tell everyone when we are pregnant how should we tell them?? Need suggestions.. just to ease my mind..