L.C.
I went back to work 2 mornings/week once my son turned a year old. I find it SO rewarding to be able to work in my field and interact with other adults and children a couple times per week.
I still consider myself to be a SAHM but I love wearing "real" clothes and make-up on those mornings and having adult conversation. I was really torn (at first) about taking the position but I definitely made the right choice. Plus it gives our moms a few hours alone every week with their grandson.
If you're totally content being a SAHM right now and you don't feel like you're missing that "adult" part of your life, then you should definitely stay home and enjoy this time with your babies. If you're feeling the need for more adult interaction and conversation during the day, then I would consider taking the position.