Giving one's wife the choice does not count as a divorce, unless it is intended as such

وَحَدَّثَنَاهُ الْحَسَنُ بْنُ عِيسَى، أَخْبَرَنَا ابْنُ الْمُبَارَكِ، أَخْبَرَنَا عَاصِمٌ، بِهَذَا الإِسْنَادِ ‏.‏ نَحْوَهُ ‏.‏