M.H.
Hi C.,
Is there anything different about her house that you notice when you walk in? A smell, a feel, do you sneeze or cough? Sometimes it just takes one thing to agitate a baby. Of course he wants you and wants to be home but most little ones calm down after a while. If he is so agitated the whole time you may want to pay close attention next time you go and see if there is anything that might bother you if you stayed there a while.
God bless,
M.