please, let's do it, because i absolutely love this secret mlm scheme she's got going! what if they met way back after mira's husband 'died' - cass could've been the gringotts cursebreaker that went through any random potentially cursed heirlooms he had before they went on to mira? alternatively it could've easily been a situation where cass came in to buy some of her products and they hit it off, either or!