Unfortunately for you, his sister is also good for more than just remembering holiday dates. You know how he acts all tough, but inside he's just a shy little softie? Well, he's way too bashful to walk into a boutique and buy you lingerie. It's far too embarrassing, so he had his sister do it. And in case you're wondering why that camisole doesn't fit quite right and the bra seems to be the wrong size, it's because he didn't tell her your size. So, yes, your new lingerie might be a little too snug or way too big -- just depending on how your sister-in-law perceives you. What a gift!