The Pen Pal Paradox

Someone has been giving anonymous letters to Kifayat Anjum since her school days. It's not going on for one or two days but for years. No matter how she tried she couldn't find the writer of those letters. At first Anjum thought it should be a someone teasing her but day by day she realizes it's not just teasing her but also making her fall. She is really curious who is this pen pal?