Brother & Sister

So I struggle with this question that my 5 year old daughter say's to me "I want a brother that can talk". No matter how many time's I explain our situation to her she see's other family's with sibling's who talk and play with each other and she want's that too. How can I argue with that. I have a sister that I can call and talk to any time I want and unfornately she will probably never have that. I just hope that one day she will see the gift that her big brother give's her without saying a word. Because he can't talk he has to show his love and affection to the one's that he love's by his action's.
When he look's into your eye's you can almost her him say I Love You, when he put's his arm's around you, you can feel that he care's, and when he give's you a kiss you know that he Love's You...