>>725132787
Keiko was pregnant with her husband's baby. Due to off-screen shenanigans, they had to put the baby into Kira. (This is because Nana Visitor was actually pregnant with Alexander Siddig's child at the time and didn't want to quit.) Kira is asked to move in with Keiko and Miles because she's carrying their baby, Miles and Kira wind up realising they might have feelings for each other.
Presumably anon is upset that the relationship goes nowhere because Keiko remains inconveniently alive and Mile's wife.
