What can I do for possible theft charge by switching the tags to a few items to a much lesser amount?

I am a mother of 6 yr. old twins and a 1 yr. old. I recently went to a local store to purchase an outfit for my twins for picture day tomorrow. I, however had a 14 and 15 yr. old girls with me, they stay at my place a lot because their parents just do not take care of them. Long story short, I don't know what I was thinking but I ended up switching the tags to a few items to a much lesser amount. I had not known the girls had went in the dressing room and stole a bunch of clothing which was in a bag, they also put a shirt in my daughters bag and clothing in my little girls diaper bag...we all had to go in and all the merchandise was recovered. I offered to pay for it all but the lady wouldn't let me. What charges am I facing? I am so sick to my stomach, I was told we all would get a court date and the lady from the store gave me a paper as to call the store about paying the amount!?!? Please help!!!!!!!!