How to tell in laws

Me and my husband of 2 and a half years have had a rough marraige. Because of this his family hates me with a passion, to the point that they pretend I'm not there. I recently found out I'm pregnant. After 3 miscarriages last year. We are blessed to have a daughter together already. But I'm terrified to tell his family that were expecting another baby. Advice on how to approach this would be greatly appreciated.