If Emily (my wife) dies and I remarry to sussie and we both die, who will I be with in heaven?
Neither of them, if your vows were “until death do you part.”
You won’t be with either of them after you die.
Both. Of course, you’ll just be in heaven holding hands and singing hymns and such, so it really won’t matter all that much, sexually speaking (which I presume you meant by ‘be with’). 
ETA: You might luck out though and one of them was really having a steamy affair with the cabana boy…
-XT
And how are they going to feel about the 72 virgins?
They’ll take one look and say, “OK, that’s why they were all virgins.”
Would she know your name if she saw you in Heaven?
Are you Christian?
Matt 22:23-33
That would depend on which ones of you get to Heaven. Assuming that you do, you’ll be with whichever of them (or both) has also gotten there, as well with all the other billions upon billions of people who’ve also gotten there.
What you won’t be doing is have sex with anybody. And no, no masturbation either. You’ll be beyond mere physical pleasure.
ETA: no, going to Hell doesn’t get you to keep having sex either!
ETA-bis: this is answered from a Catholic POV.
You have a eternal soulmate that you were one with in the beginning, such as Adam and Eve were one in Adam before the genders for humanity were separated. As such there is no marriage in heaven, you are with the one you are designed to Love and adore. The people you know here on earth and are close to and love will be part of your immediate family, sisters, brothers, or a generation up or down (parents/children).
Also gender doesn’t mean the same as it’s here, the best way to describe it is you will share both roles and both bodies, and move between them.
Source: Divine revelation
I think it was in the book For Love of Evil where a bunch of folks in Heaven were trying desperately to get out and go to hell because it was more fun…
-XT
Which begs the question, what the hell do you do all day long?
In the Hindu religion, when He was on this earth, Krishna loved Radha as a child and as a teen but grew up and married Rukmini. It always bothered me - who did He sit with in heaven? It didn’t seem right to part Him from Radha even in the afterlife.
Many texts and pictures I have seen simply grab a card from the Muslims (well Akbar was one of our greatest kings and he did influence us greatly) and have Him marry both. Great, but is Radha willing to share? Those are men’s laws - two women to a man. Is that even what Krishna wants?
Some have said since He rescued Rukmini from a cruel fate (marriage to some idiot) that she would happily serve Him for all eternity - but that doesn’t sound like much of a heaven for Rukmini to me.
And still others say that Krishna and Radha are both avatars of Vishnu - literally two halves of the same soul - so it doesn’t matter, they are united in moksha anyway. Which is just great, I guess, but we do have a concept of heaven, it’s just…temporary, or something, until the devas also achieve moksha. So what happens in the interim?
And I have never really understood moksha anyway. But then, I think you need years of meditation/study to truly understand moksha.
I’m afraid my subscription has lapsed, and I can’t locate those findings in Div. Rev.'s online archives. Can you link to the original study?
Nobody knows, and all who respond have an equal amount of evidence(none) for their opinion.
Personally, I’m hoping for the 36 hookers (MUCH more fun than the virgins), along with endless barrels of single malt and fine Cuban cigars…
(sadly, I think the reality is that once you are gone you won’t be with anyone…just dead)
-XT
Karaoke.
Sober karaoke.
Out of curiosity, is this the official teaching of the Catholic Church? And do you have a cite for it?
I would hope (and perhaps even go so far as to expect) that there would be some heavenly analogue to earthly physical pleasure. Otherwise there would be some Good or Perfection of our earthly existence which our heavenly existence would lack, which doesn’t seem right somehow.
I think the OP means, “What does your religion/personal beliefs say about spouses and the afterlife?”