Morrigan thread - "Tis cold in my tent, all alone..."

Yes. If Kieran was the Old God Baby, Flemeth removes Urthemiel's soul from him, leaving Kieran as an ordinary boy.

If you view this as a secret test of character from Flemeth (which Morrigan even suspects it was).

By showing that Morrigan understood motherhood and was willing to sacrifice her own body/soul in exchange for Kieran, that demonstrated that she was worthy to become the next host of Mythal, who was considered the patron of motherhood.

The epilogue also seems to imply that Flemeth knew (or suspected) that Solas would come for her power and that she wouldn't survive their meeting, so she needed to be sure that Morrigan was ready to become the next "Flemeth" and host for Mythal.

Granted, Morrigan may be taking over that role in the next game, even if Kieran never existed or was the OGB in your worldstate. But I like that if OGB!Kieran does exist, the final interaction between Morrigan and Flemeth in Inquisition takes on a whole new layer of subtext when viewed in that light.

That might even have been one of the reasons why Flemeth wanted Morrigan to do the Dark Ritual, not only to save an Old God Soul, but to teach Morrigan about being a parent. The Morrigan who did the Dark Ritual in Origins only thought of Kieran as a pawn to increase her own power... but now she only thinks of him as her son and would lay down her life to protect him.

I suspect this was the whole point and Flemeth's true plan all along.