Assalamu alaykum.

A husband issued three talaqs to his wife in written whilst the wife was present before him and then gave her the paper, without actually uttering the words of talaaq. The husband's sister-in-law was also present. The husband claims he was emotionally and mentally pressurised to do so by his sister-in-law who told him his wife was not fit for him and that he was not in a sound state of mind at the time . All the while, the husband was crying and whenever he hesitated in writing, the sister-in-law forced him to write. He also claims she was reading some kind of invocation upon him to make him do as she ordered. Please clarify whether in this situation the divorce has taken place or not.