Do you check on your children before you go to bed?

So when the girls first started sleeping through the night it was about the time I went back to work.  They were 4 1/2 months old.  I would get home around 5:30 from work and they would go to bed about 8.  So before I went to bed I would sneak in and get a little peak at them.  It was just an excuse to see them one more time because I missed them so much and had gone from spending so much time with them to only a few hours a day.  It broke my heart to put them to bed every night when I had only been home a couple hours.

Well this has led to me still checking on them every single night. I sneak in, look at them, make sure they are covered up, etc. and then leave.  Every so often they look so cute I take a picture of them.  Shane shines a bright light from his phone and I take a picture.  They don't even flinch.

I could watch them sleep for a long time.  I love watching them sleep.  But the question is, is this normal?  Do you check on your children every night?  At some point I'm going to have to stop because I don't think when they are teenagers they are going to appreciate me sneaking into their rooms, shining a bright light in their face and especially not taking their picture.  But at what age do I need to stop?

Ok, this has just been on my mind lately, but just for your enjoyment here are a couple pictures I've taken of them lately.

Siena loves to sleep with blankets over her head, much to my dismay.  I always remove them, I can't justify walking out of the room with a blanket over her head.

Aria loves to hold on to her stuff...her doll, her books, etc.

And Jaron, well he likes to be swaddled, or so his mom tells him.