what does cousin sister wants?

hi i am ajit sharma 25 years old...i am an engineer ,its a true incidence....its about my relative(daughter of father's sister). her name is seema she is 18 years old......she oftens comes to my home,and i remain outside for job ,we meet generally in some occasions or summer vacations..she talks very nice to me...once she came to my home and once we were watching T.V i was sitting on bed .and she was sitting on chair besides me ,i while talking put my hand around her waist and hips and she did not said anything .instead she she was normal and she did not say anything ,after some time she went from there and again came and sat on same chair ,where other 5 chairs were there..and even once while talking to me on phone offered me to come to her house ,where she lives whith her grand mother in village....what does it means?is she likes my attention ?if yes then y dint she co-opearte while i touch her.and if not y dont she tell me ,not to touch her.??????plz eplain me