That's her. I think she got really large later, but I'm not going to be rude to her.
But the older sis was the RL sister of Kirk Cameron, whose tv sister was Tracie Gold on Growing Pains. She was super hot to me, and I had no idea until years later that her older sister Missy was the saucer-eyed blond that I had a similar crush on as a kid in the sitcom Benson. Crazy. But it got even crazier than that. I made a post about it once. I usually don't like to talk about my personal life in such ways.
But yeah, two sisters from those old tv days that I fell hard for both of them without knowing they were sisters. Makes me wish I could meet and talk to them even today:p
Hotties that they were.