Child support ex and new husband.

Okay, long story short.

Me and my ex broke up, we have a 6 year old son. I got remarried and my husband has an amazing paying job he makes over 300k a year. Me and my husband decided I'll be a stay at home mom.

Well, now my exs child support went from 258.00 to 881.05 plus medical and he's mad because they don't count my husband's income. He's saying, it's making it impossible for him to provide for his twins ( not my kids, nor responsibility) and if I'd still be working he wouldn't have to pay that much which is true, but by law my husbands income doesn't matter.

Would you lower his child support ? Or make him stay to his court order because his original support wasn't even enough to support him.