Christopher Negus
Hi Moheeb, try using some Epoxy filler to repair the crack. Unfortunately the colour will more than likely be slightly off but it wont be very noticeable, and you can always paint it to match afterwards (Just make sure to use suitable paint!) Alternatively they sell sink repair kits in main stores like screwfix or toolstation. I would also recommend a bunch of flowers and a sincere apology to your mother! I hope this helps and best of luck resolving the problem! - Christopher CLN Maintenance and Development