pretty sure the creampie thing is just a longstanding kink, she's claimed a number of times in multiple different contexts that she prefers/insists that her sex partners have had vasectomies (specifically because she explicitly doesn't want to get pregnant, but she also doesn't want to deal with the hormonal fallout of the other birth control options available to her).
obviously, i have no insight into her feelings about her current partner, starting a family, etc. none of us do. but if i had to play armchair psychologist, it seems to me her default position is something along the lines of "i experienced both an extremely traumatic childhood and genetically inherited mental illness, and to pass either of those on to a child would be an intolerable cruelty".
(for what it's worth, i think she's wrong. none of us control our genetics and to worry about that is foolish, moreover i'd argue someone who suffered as she did is, perhaps, uniquely qualified to show compassion to children. but my opinion is irrelevant, it's her life. maybe you're right, and she's long since transferred any nurturing, "maternal"—whatever that means—energy toward rescuing animals, etc.)
anything can happen, and people can change, but if my read on her is even directionally correct, it would require a pretty extreme shift in mental attitude for her to become baby crazy.