To Have a Second or Not

My husband and I have been on the fence about having a second child. If we do, we are aiming for later in 2025/early 2026. I always pictured having 2 kids, but pregnancy and postpartum was extremely rough and the idea of going through it all again is very daunting. My husband also has a child from a previous relationship who is a tween, but we don't see him more than a few weeks each year due to distance. The high conflict co-parenting dynamic also doesn't help the situation. My husband and I both work full-time. I'm remote, he's hybrid. We can only afford daycare two days per week, which means I am often working and taking care of my toddler. Adding another would only increase the workload (not to mention the additional expenses). But I always pictured 2 kids. I pictured family memories as a family of 4 (or 5 if my stepson is here). I watch my daughter struggle every time her brother leaves and I see how excited she gets every time he comes back and it breaks my heart. I never wanted my daughter to be an only child or to grow up alone or to be alone when we grow old. So what made you decide to have two instead of just one? And if you were on the fence and had two, are you happy you did?