Jealousy comes from lack of trust, if your S/O loves you and loves you unconditionally, it also means she trusts you, unequivocally. So she wouldn't have reason to be jealous, because she believes that no matter what comes across your plate, if it ain't her, you wont eat.
I would say the opposite is tru, if she mad jealous, she dont love you, she just views you a property. You are just something that belongs to her, and you could be any nigga, it has nothing to do with you.