I am a married man loving a married women?

recently i had an occassion to be with a married women for some days for some official purpose. we become good friends. there after we used to call over phone at least 1-2 hrs daily on many topics on different times for the last 4 months. i unknowingly fell in love with her and now i am unable get out of this. my relation ship with my wife was not smooth.but her is not like that. she is a good lady and her charector attracted towards her. i and she have 2 kids each. i dont want to break my or her relationship with spouses.i dont know whether she loves me. my wife is doubtful about the realationship, that she knows. but still she used to call me and we hide the relationship with each of our spouse. we have not spoken anything about love. but i think she knows that i am very much intimated to her. both of us stay in our different work places and our spouces are not with us. recently she stopped night calling and also reduced the call duration even in daytimes. we used to talk about the misunderstanding in my life with my wife and she use to give many suggestions. i dont know whether a married women will call a married man frequently and talk for a long time without any intimate relationship? whether such a relationship is love? or what she mean? whether a man and women can be just friends without the knowledge of their spouces? her husband do not know thet we are intimate friends .i can not understand what relationship she has with me. since there are signs of reducing the call i am very much hurt. i am afraid of talking the same to her that i may loose a good friend. how to know her relationship with me and how to get out of this. please help