Favoritism/ family drama, advice please

I’ll try to keep it brief. A little backstory:

My older sister has been coddled by my parents her whole life. Super dramatic person, jealous that I had a baby before her etc etc.

Well she finally had a baby and she asked my mom to watch him full time for her. Of course my mom said yes. I am blessed to be a sahm so I never had to ask. But prior to my sister getting pregnant/having a baby, my parents never offered to watch my kids (for like date night).

They said they’d watch them if we asked, but they ‘don’t want to bother us’, so they never asked.

Well my hub feels that our kids are slighted, more so now that my nephew is in the picture. My hub wants to say how he feels, but I would rather not say anything at all. And when my kids grow to realize that my parents put little to no effort in the relationship, then my kids will form their opinions on their own.

It hurts. For example, when my son was a baby, he would cry and my mom would laugh and say ‘here mama, come and get him!’, but when my nephew cried, she tried soothing him.

I’m not trying to be petty or immature, but I’ve tried to let things go, but my husband is just pissed. There’s more drama from the past but ain’t nobody got time to write that all down lol. It is what it is.

What do you ladies think? Some unbiased insight would be greatly appreciated, I have no one to talk to. I don’t want to cut my family off. But my hub makes it seem like every good thing they do is contrived or fake. I know you can’t change people. They’re still my family and I wouldn’t accuse them of not loving my kids. Please give me advice.