Re: You're kidding..
it's theoretically been retconned. Val is alive now. A few years ago, issues numbered in the mid-50's of the third run, they did a thing where Valeria VOn Doom had Valerie Richards soul, sent into another reality by Franklin after she was stillborn. There's a cosmic baddie named ABraxus who's apparently kept out of reality by the various Galactuses in the universe, but the 616 Galactus was apparently dead.
I really don't remember it all but it ends with Galactus back, Valeria gone, Sue extremely pregnant and wondering why people are suprised.
A few issues later she has Val. There's no reference that I recall to this being a very dangerous for Sue third pregnancy, they didn't reset the MU timeline several years and there's no mention of the creepiness, in my opinion only, of naming your third daughter after your stillborn second daughter.
So I would have to say Sue's second pregnancy didn't happen and this one did in it's place a few years later comics time.