This was a struggle for me when my kids where little. My husband didn't start going to church with me until after my kids where in school, and if I would have told him I thought we shouldn't lie to our kids about Santa, he would have thought I was insane (i think he kind of thought I was anyway.)
When my girls started getting to the age where they were getting skeptical about Santa, they would ask me. Mom is there a Santa, and I would say "what do you think?" So when my oldest came to me when she was in about second grade and point blank asked me if there was a Santa, and wouldn't take my "what do you think?" answer any more,
I said "BreAuna you know I would never lie to you right?"
"right"
"Do you really want to know if Santa is real?"
"yes"
"Okay BreAuna Santa is not real"
She was very upset and cried, something she rarely did, and still doesn't. It made me feel like I did deceive her, my husband felt like I had told her too soon. It wasn't fun but sometimes you do what you have to do!