Hi TrueBlueAngel,
Sorry to hear what has happend to your Dad....I hope he is ok and on the mend soon.
You are already moving in the right direction, preparing yourself and bringing your shakes with you. Most people would use this as an excuse to eat and by all means no one would blame them but what I would say is you have worked so hard to get to this stage in your weight loss, just think how disappointed you would be with yourself if you start to gain weight by eating! If you really felt the need to eat as you are around people that are eating, try doing SS+ for the week and stick to the low carb foods allowed.
Be strong and stay focussed. I'm sure you'll have lots of things to be dealing with, maybe the family will assume you just don't have an appetite???