Rumor is that she's somehow related to NVidia's chief. Like 2nd cousins or 3rd niece / something-something removed or something of that nature. Just for some delicious irony.
Jen is 表舅, So it should be Lisa Su's mum ( it has to be on her mum's side and not her dad ) 's Dad or Mother's ( Grand Pa / Grand Ma ) , and their brother or sisters's son.