Not baby related but need to vent

So my stepmothers mothers memorial is today and I've been contemplating on if I should go or not because the fact that my dad and her are and bad terms and he basically didn't want anything to do with her kind of like a toot and boot situation which he's been doing that's why he has 4 kids from 3 difffent women but I just feel like it would be nice to go to pay my respects to their family because I did at one time know them but after they had a big fight over my little brother I haven't seen them for 12 years now and I don't want them to think that I'm here to start any trouble just simple to pay my respects to the family that's all.