Unfaithfully hers

ALIA Shawkat (above) wasn’t surprised to learn Desi Arnaz was unfaithful to wife Lucille Ball. “She married a Cuban,” the actress told The Post’s Nicki Gostin at the premiere of “Being the Ricardos.” “I assume there were dalliances.” Shawkat then clarified she wasn’t saying that all Cuban men are incapable of fidelity, explaining, “At that time, I think most husbands cheated on their wives.” The Aaron Sorkin movie stars Nicole Kidman as Ball and Javier Bardem as Arnaz.