it's natural and normal to feel jealousy and a whole range of other emotions, and i do believe that a close friend or family member having what you haven't got somehow makes it worse. and then there's the guilt because you feel you "should"be happy for them...just know it's ok to feel this way. my BF announced he and his long-term fiance were preggers just days after i miscarried the first time, and i still choke up when i think about it. as for your DH, it's very difficult for men to articulate their emotions. my DF couldn't in february, and it's taken a second m/c for him to be able to actually feel his grief. please be gentle with yourself and do allow yourself to feel the emotions that are welling up. your sister will understand.