Deciding for a third at 40!?

I have a dilemma, I have 2 beautiful boys 1 and 3. After my first I didn’t want anymore children but my husband didn’t want him to be an only child, we had our second 2 years later. After my second all I could think about was having a third! I was probably very hormonal at the time lol. My husband didn’t want a third he didn’t want to be out numbered. Now a year later I’ve started back at work with trying to get into a routine and now my husband is ready for baby number 3 and I just don’t know. Part of me really wants a third and another part wonders if we could really handle it, I’m just torn because I was so sure I wanted a third. Anybody go through this?