Change in Sleep Patterns

Bubbles, after nearly 4 months of sleeping soundly at around 8pm and through the night you've been lately (at least the last 4 nights) been staying up late and testing the limits of your parents patience. Screaming with your face planted into your mattress until we pick you up and plant you in our bed where you lay down and smile up at us. You ARE tired but just refuse to stay down. Still we are enjoying the extra time with you and other than the freaking out in your crib ... you are a super happy late night baby!