was it a sin? Part -I

there was a man working in a library as an assistant. he had no one back home as his wife had died long before. He wanted to talk with someone but he had no friends to hangout with. One fine day the man was surprised as he was pinged by someone. When he picked the phone he realized that there was a lady on the other side and it was a wrong number.So he would not speak as he was in a library. 

The lady continued and asked for her friend as there was no reply from the other side. The man would sit like an idol. They started talking in evenings and when girl asked the reason as to why he was not talking to her in day and night,but only in evenings he replied that the place where he worked had a poster which said Keep silence and at night he slept very early so there was no scope there. They talked somehow in the evenings. The man tried tried to convince her but the girl refused many times. She kept on asking as to why he wanted to meet her. The man he had a reason to meet and he would disclose it only when she meets him. The girl was not very convinced but she said yes!