Can i share the data plan between two verizon iphones?

(we have verizon btw)

my mom has an iphone 4s and is considering adding me to her line with an iphone 4. The only thing is, the added line will be an extra $10 per month and a new data plan would be an extra $30. The data plan she has now is $30 a month. Is there anyway i could share her data plan with my iphone and not have to pay extra?

No, you can share the data of the phone plan but not but not the cost of having data on your phone