They were totally just giving each other back rubs in Mexico! A suitable number of months later, Hayworth and Welles had a baby and posed for a lot of ridiculously cute photos.
You can find evidence and other writings.
But unlike her other films, in which Hayworth played the Spanish dancing lady because that was the only thing she could play, her role in Blood and Sand was sold in the spirit of masquerade.
The press began to attack.
At least for a year, at which point she married Orson Welles, known, at this point, for his arrogance and brilliance.
But the lustre of royalty did not last, and Hayworth moved on: to a string of moderate hits, to more husbands, to relative obscurity.