Favortism, advise on how to cope.

Hello ladies! How are all of you? I'm Lauren and I'm now 18 weeks along. I have a wonderful and loving husband and we are super excited about our little munchkin and are "patiently" awaiting for our gender reveal appointment, we are wanting a boy. Anyways, I have a very strong gut feeling that his father and step mother will play favoritism against our little bundle of joy. I say this because my husband is the product of a one night stand while his father was married to current step mother. They don't treat him the greatest, his father makes minimal effort to contact him and when he does its guilt tripping him for not coming around or keeping better contact. Never does he ever ask about how I or the baby is doing, but he'll brag about his grandson. I know how this may sound, I'm trying to figure out a way to better explain this. From what my husband tells me, when his sister (half sister) was pregnant with his nephew they had it plastered all over Facebook and basically went above and beyond for her. It seems like they could care less about us and our baby. The rest of his family has been amazing and asking us how we're doing, if we need anything etc. I brought this up to my husband and he agrees with me. I've been subjected to favortism my whole life, and so has my husband. It's just one of those instinctual feelings that we both have that we know this is going to happen. Do/have any of you ever been through this? How did/do you deal with it?