My mum has a tenancy to sing loudly and off-key while she does her house-work and it would be fine with me as long as she let me sing loudly and off-key while I do my work or whatever, but she doesn't believe that she's a bad singer. It's been driving me bonkers. I love to sing even though I'm horrible at it, and I've even said I'll just sing in my room. However my mum says that she can hear that too. :/ I want to be respectful and sort out the issue peacefully, but she refuses to admit that she does/has been doing what she expressly tells me not to.