I have three older half-sisters. Two from my dad's previous marriage, and one from my mom's previous.
I only say it that way for clarification. In our family, there's no "half", "step", or "in-law." They've always just been my sisters. When you're here, you're family.™ c:
Although being 9, 9, and 13 years older than me, and with our parents both working full-time, they were always more like baby-sitters than siblings growing up.. but since I've gotten older, we've all gotten a lot closer. <3
Oh, and in regards to the two that turned 30 this year, no, they're not twins. They're a month apart. And they loved explaining that to people when they were little.