Dear Rebecca, 

I am sure that the only real concern your parents will have will be that you do what God wants you to. While the most natural and common thing would be to give yourself to God through the lay movement that has nurtured you up to now, this is not set in stone; God can just as easily call you somewhere else. What you need to do is make sure that you stay close to God in prayer, and offer yourself to him to use you whatever way he sees best for his Church. Then you have to do some simple and mature examination of yourself in order to test the attraction you feel for the other order, and make sure it has the signs of being from God. Make sure it is not only an attraction to some externals (the habit they wear, for example), but a deep attraction to their spirit and charism. For example, the movement you are in might use charismatic prayer, and the order might be more contemplative; the movement may have a variety of apostolates, and the order might just have one focused mission, let's say teaching; and each group may have its own particular way of living poverty. These are just some examples, but the point is that if you have a call to another order, you will have to leave behind certain things that you have been nourished on up to now and which seem very natural to you, and maybe even seem to you the only way to do things. You will not, should not, try to bring them with you, or judge the new order according to what you are used to. You will join them in order to learn and accept fully into your life their charism. If you have a calling, that will be God's will for you.

God bless,