Saturday - My sisters wedding

So Saturday my half sister is getting married to this great guy Toby. Our Dad, whom I've never met is walking her down the aisle. So now I'm feeling all this pressure. Not only is my step mom's family going to be there, but now my bio Dad, my bio Grandmother, and bio Aunt. My Dad is freaking out as well since I was 6 months old the last time he saw me. I wasn't going to take the kids, but now I think I should so they can meet their Papa. That's what I told him my kids are going to call him becuase they already have Grandpa's. He was ok with that. I wasn't too concerned with what I was going to wear until he confirmed he was coming. Atleast MY Uncle Ron and Aunt Linda will be at the wedding to protect me. LOL I'm just so nervous.