Religiously speaking do you think this is disrespectful?

Okay so my grandmother died 2 days ago and she hasn't been buried yet, yes I was devastated and extremely sad that she ped away but she was sick and suffering in those machines. Anyways the reason I'm happy she died is cause she's not suffering anymore, I feel relaxed and happy so I listen to music outloud on my speakers and my family are all on me callin me a heartless a- hole for listening to music loudly since it disrespects my grandmothers death!! I keep explaining that it's quite the opposite that she would be glad that I'm happy and not sad that she's finally resting but they tell me those are excuses..... What do you think about this? And it's not like what I'm listening to is heavy metal or cussing music it's uplifting music with positive messages.. So anyone have any thoughts about this?