Sailing through the day

Over the last few weeks, the wee man has forgone several of his usual mid day naps.  Is this the beginning of the end?  Just as baby number two arrives (due date tomorrow!)?

We thought he might keep up his napping until he was about three but the wee man just isn't tiring like he used to.  Granted, if we persevere he sometimes relents and then doesn't want to wake up.

What to do?