Catherine of Foix marries Edward IV of England

I was thinking, is it possible for Catherine of Foix to marry Edward IV, if Francis Phoebus of Foix dies as in OTL it is possible for the English to get Guyenne again and inherit Navarre as well, is this match possible?
 
One of the problems you're going to encounter is that Catherine of Foix was born in 1468, after Edward IV was already married to Elizabeth Woodville. Even when Catherine came of age to marry in 1481, Elizabeth is still alive and has provided a male heir and a spare.

Now if you think about Catherine as a possible match with Edward V, then you might have an interesting idea.
 
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