If it's a specific example, why mention her age. What you're trying to retcon into the comment is that they really meant to say "My mother, who is not great wi

If it's a specific example, why mention her age. What you're trying to retcon into the comment is that they really meant to say "My mother, who is not great with technology, can easily sign up for Netflix." This is the way to communicate this in a non-ageist way. The age was thrown in as a clear attempt to draw on stereotypes that the elderly are poor with technology.