I said this x, yet funny thing is, in one of my WIPs, Adriel and Lilith are trying for a baby. Yet, for some reason, forget to mention it to Ava (when they propose to her after seducing her). According to the plot I currently have in mind, she only finds out about their efforts when Lilith becomes pregnant (I guess she could have figured, as they weren’t using any... you know).
Ava doesn't get mad though, she's quite excited and fluffy about it. She'll mutter "that's so cool" when touching her stomach, or lay her head on it and beam. Adriel acts in a similar way. They both weird Lilith out with their saccharine antics.
And, Ava's very sweet with Lucifer once he's born, she never wants him to feel the way she used to. She had no parents for most of her life, so she wants him to know he will always have three.
I imagine them reuniting with the OCS. The nuns would go "his name is WHAT?!"