is he right?

my husband and I are in the middle of an ordeal with his ex trying to move out of state with my stepson. she's very shady and tried to keep it a secret as well as she made a contract with a lawyer a year ago that my husband stupidly signed that gave her more control over the child and him. anyway my husband is trying to figure out custody with her and instead of being smart and doing his research talking to his case worker and a lawyer etc. he just wants to "trust" her and tells me he's handling it and I have no right to know anything going on between them and this ordeal because I didn't give birth to him and I'm not paying the child support. I'm extremely offended. I've been around since he's been born and take care of him when he's here, not my husband. So I told him "fine, if I have no right to him then I'm not taking care of him anymore . You can do this all on your own." I know I probably shouldn't have and if it came down to it I would still take care of him but it's so horrible to be like that to me