...I thought I was done...

So after having my daughter I wanted to be done with kids. I have a 3 year old boy and now a 3 month old daughter. However my SO told me he wants AT LEAST 2 more kids. Part of me is excited to try for more and part of me just wants to be done. However I have always wanted a big family and I'm sure my kids would love more siblings. So, mamas of more than 2 kids, hows life? Hectic? Do you love it? My main concern is finding time for each child and showing each one enough attention and love. How do you do it?