milestone moment : getting ready for potty?

i think perhaps arwen's ready to pee or poop in the jamban. lately, she's been signaling that she wants her diaper off by trying to pull it down herself and patting her, you know what. maybe she can already tell that she feels that she wants to pee. apparently according to our babysitter Su, arwen wants her diaper off and once it's off, Su will take her to the toilet and she'll continue peeing. she can actually control and hold her pee alrealy. good huh? but this new-found habit is slowly breaking our bank. we're changing fresh diapers everytime she pees. and we're using the expensive pull-up pants kind. tsk.