Miscarriage & family support

Back in February of 2018 my husband and I lost a baby due to a miscarriage after trying for 3 year’s. Since we have miscarriage we have been trying. well a couple of weeks ago my mother in law told my husband and I that her other son and wife is pregnant. I was having a hard time to be honest because we got pregnant with the first grand child in my husbands side. But my biggest concern is when she finally has this baby or even before having this baby she is my mother in law is going to treat it as she is having the first grand child the other brother and his wife. If she does that how would you women handle this? Would you be hurt if she treated it like that? Help me girls I need some advice. I just don’t want our miscarriage to go unseen as it didn’t count as a baby because it does count 100%.