Do you see a problem that I don't want to attend a relative's 98th birthday party?
Why are you scared to go there, is it because of the advanced age?
It's not because of the age. It's because we all got together and we sang La Cucaracha and it reminds me of my painful and gross circumcision and I don't like it.
I can see you are a bit worried, but one should not avoid a family birthday, especially when they are so close to 100 years old! It is rude and you should be present there for your family, otherwise they will stop inviting you to family functions.
I don't care if they will stop inviting me to all the family functions.
Even if you don't care about that you should care about just being a good person and being there for others during their good times.