They were on again when Kippei realized that Kokoro needed him... remember that scene in the classroom when he made her hug her with all the classmates still there... maybe they are more cautious with the baby....
I really do like Miki... I want to see what happens... I think she is transfering to his school or something like that... maybe that's why she appears at their home... in order for a shorter commute....
But Kippei gave Kokoro some in the nurse room... i think that should keep her satisfy for a while lol