Husband is off and on about wanting another child.

My husband loves are two kids (6 & 4) and states he is open to having more. However, he wants to have sex spontaneously, not every other day like a ttc couple. He doesn't support ovuation testing and fertility supplements. He wants to just 'let it happen', which is fine, but I am all in! He didn't come to the doctor with me to have my implant removed either. Any one else experience this? Feels like I'm ttc by myself here.