as parents try not to force her to stop, thatll just make her hate you. try to ask her y she does it and if you can help, tell her that you will always be there to support her and dont rush her to stopas she may not be ready.try not to give the subject too much attention as itwill %#@&#! her off and may make her feel uncomfortable... mind u im going on my own experiences
good luck

p.s. she get to see her every week?! lucky better than me!
heheh.