Ahhh Jacky this is a completely personal decision... there is no possible way IMHO for anyone to decide for you on this one...
One thing though: IMO, It will not be disrespectful of you to go; if your mind can be at the show... then... It might be a good thing for you to do.
Is your dad going to be taken care of? Is he counting on you? is there a family reunion going on... Take these things on consideration, but truly, this IMO is a very personal decision - There is NO right or wrong here, just the way YOU feel about it, and if you can handle the situation.
Me, a a latin, who cries with commercials and every soap opera... there is no way I could handle - I am way too dramatic for it... But that is not because of my morals, or what is right, or wrong, or whatever... That is because I am way way way too emotive, and would be crying around like a freaking baby at the show, and would be a silly disaster

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So, IMO, just look inside how you think you would handle it, and if you think you can.... then go. If your family needs you, then... There will be other shows to attend.
