Well throughout the time with Graham she couldn’t get pregnant bc the curse stopped time, hence the reason Ashley was pregnant for 28yrs, but doesn’t explain why she didn’t when Emma showed up and started to weaken the curse. Unless they used some type of birth control.
I could def see her at least trying to get pregnant with Graham within that 18yr time frame, not realizing that she couldn’t get pregnant bc of the curse. Now I don’t think it took her 18yrs to realize this fact.. This is all def an interesting factor that I would like to see answered..