The twist at the end of the episode proved that the real Iris is still trapped inside the mirror world.
Iris was a little off from her usual self for most of “Love Is A Battlefield,” but her explanations were believable enough.
Somebody is impersonating her with her friends, family, and husband… while Iris watches.
The Flash seemed like it was going for an hour of shenanigans for its Valentine’s Day episode, with the intro appearing to reveal Iris easily and underwhelmingly escaping the mirror world after the killer cliffhanger from the week before.