Sad just a little

My son is almost 7 months old. I can’t get it out of my head that I want another baby. My husband was firm when we got pregnant with him that it was going to b me the last. We also have a 10 year old. My husband is almost 40 and I’ll be 34 in a couple weeks. Idk why I want another baby so badly. I have snuck it in a few times jokingly to see his reaction. He seems like it would be a absolute no. So I will enjoy this baby to the complete fullest. Just needed to vent that. Thanks for listening.