My Parenting Dilemma

I've often heard the words "strict" when others have referenced our style of parenting. I see it as being consistent. So, when I'm presented with this, I have a bit of a parenting dilemma. I sent the girls to bed. Typically, they go to bed without argument or issue. Tonight, I went in to kiss them goodnight (we have a really funny ritual of hugs and kisses goodnight) and turn off their light, I discovered these adorable cutie pies sitting together and reading and discussing a book. Seriously? What is a parent (and a bookworm herself) to do?? =)