Thread:BaymaxBat/@comment-112155-20180406005757/@comment-996391-20180408094655

BaymaxBat wrote: Michael is her her only known sibling,

Which doesn't mean that Marvel Studios couldn't one day make another one. Marvel Studios doesn't cooperate much with Marvel Television. The movies don't make references to the characters who originated in the MCU's TV series. If you find some proof in some official MCU material that Michael is Sharon's grandfather, that's when you can out that info in the articles. Not before.