Get comfortable, Suze, it's our own live soap opera.
Jacen and Aunt Sarah are suffering from a disease I like to call Epic Fucking Denial. I caught it too, only my case? Mild compared to how bad this is. Their's is like the Black Plague of EFD, with real concerns of death. Either their's from suffocating from UST, or ours from head trauma.
So Jacen, was married to Allan'a mom back in L.A. Allana can jump in and cover that whole mess. And my Aunt Sarah (step-great-aunt through my (step)mom and her uncle's marriage to Sarah) was married too. Peter checked out from reality (complicated is not even the word for it) and hasn't been around since before the Hub, so she's been on her own. Jacen too since he showed up.
Basically, they're crazy about each other, but won't admit to it because they're too fucking noble.