Is anyone else bothered by Barry dating Linda in the TV show? Now we don't even know if Iris has a brother, I think they've been very careful in being vague on if she was an only child, so they could still introduce him and Wally in the future. So yes, this is a completely different reality, but whenever I see them together something feels wrong to me.
It's his potential nephew's wife in a different reality. I can't think of a good analogy to compare this to when I'm trying to explain my uneasiness to my family. I know I should relax and just enjoy it, but it will take a while.
Barry looks like a fusion of comic Barry and comic Wally, so him dating Linda makes perfect sense. Barry is a composite character and has a composite love-life.