Ds grategrand ma was in hospital soon to pass away last week took ss (14) up there granny was off her head on meds saying all sorts and ds just kept laughing Ffs not impressed 
Put it this was ds was laughing so much he was still laughing when we got home ff he was laughing so much I went him to his room till he calmed the frig down.
My hairdresser says it's nervous laughter and she is the same however I told ds I understand nervous but if he can't get his shit together he can't go to the funeral now yesterday granny passed at 6:45 am when I got the text told ds he burst out laughing so he is defo not going to the funeral I can't risk it oh thinks I should take him
*i can just see it now ds viewing the body with his bottom lip quivering away 
Ds is not overly fussed about going however if it was my family I may be able to explain any silly behaviour on ds part but this is my exs grandma and we have a fraught relationship as it is and I just don't feel I can take ds if he can't keep a straight face I can't risk it
1- I just don't know what to make of ds reaction to all of this
2- I just don't feel I can risk it
AIBU