10. They're Always Brutally Honest
When she turns up for afternoon tea in a pink teddy bear t-shirt, you're not scared to hurt her feelings and make her get changed. It's better in the long run than simply letting her destroy her street cred. Besides, she does the same thing to you too; whenever you're shopping and you pick out something that she knows will make you look chubbier than you are, she'll say it. And of course, she'll also tell you when you're just being mean because you're tired and haven't eaten anything in an hour, and soon enough, she's put you down for a nap and is making you dinner.