She seems to have had more genuine desire to marry him rather than other contenders. He was her last chance to marry someone rather suitable, and to have heirs of her own, which she may have felt would gurantee Protestant England. She realized it was her last chance. But he was french, and catholic, and much younger than her, and rather undesirable in view of his personality, habits, and parentage. She was also getting up in years to have children at all, and people in England disliked the idea. She realized all of this, and perhaps realized she was being too much like her sister, also aging, childless, trying to gurantee her regime, unmarried, trying to marry a younger foreign royal from the opposite religion. She had more wisdom though, and resisted. But perhaps she was only flirting with idea. And no, she wasn't really a children oriented person, nor perhaps one oriented towards heirs.
