If I don’t eat Kitniyos during Pesach, do they become Muktza for me? If yes, at a kiddush I cannot serve them to a Sephardi who is permitted to eat them?

If I don’t eat Kitniyos during Pesach, do they become Muktza for me? If yes, at a kiddush I cannot serve them to a Sephardi who is permitted to eat them?