"Step-sister's" wedding shower

I went to Edmond today with my aunt Suzy for my dad's wife's daughter's wedding shower. Aka the "stepsister". I say "stepsister" b/c we are adults and neither of us live at home, etc. therefore she's dad's wife's daughter. I enjoy her, and I think she is a very nice person- but how totally akward today was- having only really spend 6-12 hours of "quality time" with her over the past 9 months. And I have to assume it's weird for her too, but maybe not, we aren't close enough for us to discuss our weirdnesses with each other lol. As Jeremy says my other stepsister (mom's husband's daughter), who lives in England, has more in common with us and we have seen more than the "stepsister" who lives in Edmond. This is a very true statement, but I don't really know how to be friends with the "stepsister". It's like a person you meet and think you could be friends, but then you have one convo and you realize you've just discussed everything you possibly could with that person. Anyways, she had a lovely shower, although far too many shower games lol. Looking forward to the wedding in December though, I think she will be a beautiful bride. And her fiancé is a great guy, and he's named Jeremy to boot. Now I'm only stumped as to what to get them for Christmas...?!