Grrr at your sister in law. How petty.
I have given my sister loads of my things... and would have gladly given them to my SIL if she was having a baby.
I have heard that cold weather can make their gums hurt more too... not sure if it is an old wives tale or not... but when it is really cold, we have found that putting some bonjela on Harry's gums has helped settle him down.
With all the SIDS stuff, I am always too cautious about over heating Harrison... but now he know's how to get out from under his bedclothes if he is too warm... he has a doona on his bed (a Cars one)that we usually take off and he has a cot blanket that we put over him... when it gets too cold, we trade the blanket for the doona.
I hope Jem has a better sleep tonight