issues with my wife?

me and my wife just had a baby boi and after her 4-6 weeks of not being allowed to have we started to and there was no problem. but now even when i get her horny she doesn't want to have is it something i did wrong or what? im getting worried im failing my wife as a man and im ready to go but she doesn't want to and i don't know why please give me an expedient reply as this is a very sensitive issue.