So I think Lucas slept thru the night last night, for the first time since Thursday night (i.e., 4 days). And it is also since Sebastian has been gone at his grandparents. After ruling out tummy ache the first night, teething the second night, overstimulation the last night, we have come to the conclusion that it may be the absence of Sebastian.
Sounds crazy. How can little 7 month Lucas notice, let alone, CARE that Sebastian is gone for a few days? I mean, yes, Lucas stares at Sebastian the whole day, follows his every move, cries when he cries, and stops fussing when Sebastian comes and tickles/kisses him. But WOW!
The good side is that now that Sebastian is home, we can hopefully sleep again. The bad side is that I will be apprehensive every time I have to leave Sebastian at his grandparents.