If one cannot treat their mother with mercy, they are not deserving of Jannah.

She helped you with your first steps; now, whilst she's in her final steps you walk away? She wiped away your tears; now you cause her tears to fall? She bore patience when you couldn't explain; now you cannot endure her forgetfulness? She bore you for years upon years; now - you can't bear her in her last years?

Indeed if one cannot treat thier mother with mercy, they are definitely not deserving of Jannah,.