They already had a child. These few past episodes are like flashback tho.
It was a joke. I've already seen the earlier pictures in the pool. But those were purposely designed to be a horrific reinterpretation of what Jeanne Alter's going through here.
Maybe that's where Jeanne D'Arc Alter Santa Lily got the idea from in post #3017301. Jeanne Santa Lily may have thought that Jeanne Alter ate too much meat.