Being pulled in 3 derections

I have 3 kids a 13 yr old that i need to be involed in because she is a teenager that is starting to like boys and hormones ranging is try to keep her active in dancing and school activities but i find that i'am having trouble with trust issues with her i want to trust her but she is sometimes get caught in lies and she cant look me in the face so i know she is lying but i feel she thinks i will not understand i try to keep talking to her. then i have a 3 yr old and 5 yr old they are great ages they just want love and to read them and book and fix them their fav. meal.