New House Guest....Bad Timing

So this morning I go to feed my daughters hermit crabs (another new house guest) and just happen to see out my kitchen door a nest with a mama bird diligently working on it!

We just, this past weekend, started building a deck. I noticed then that either a bird had started a nest or there was just some debris in the corner of the door on the jamb. I didn't think much of it.

Well I guess my first thought was right. Now I don't know what to do! We have to finish the deck and I hate to disturb her work. I know she won't stay regardless once the deck work continues and is complete. I hate for her to lose her nest though...