i was in the same boat few months back,my 17yr old kept getting calls offers of lifts prezzies from her 32yr old boss i wasnt too pleased as you can imagine,well it got that bad he was calling her everyday if she wasnt in work to see what she was doing,hes even called at our home with things for her,it was getting me really scarred it was like he was storking her,i went into her work one day when she wasnt in and had a good chat with him,told him to stay away or ill be phoning the police,it got that bad people at her work were being funny with her,so i went in again told the higher boss and he wasnt pleased either in the end the feela left thankgod,she still gets the odd call but she just ignores it.i think you did the right think reading her messages id ahve done the same,shes lying to you as well saying she got the bus home,also i would put her on the pill.if things carry on with this man whos married id have a word with him find out whats going on.good luck hun xx