I can't fathom the emotions she must've been feeling at the event, but I'm going to go ahead and assume they weren't (and probably still aren't) too enjoyable.
However, you'd think her family would be by her side and making sure she was doing OK while attending the inauguration of her vicious opponent, right?
Well... Bill seemed to have a few other priorities in mind.
In the video, Bill and Hillary Clinton can be seen standing in the crowd behind Michelle Obama.
Bill can then be seen gazing into the distance, biting his lip and mouthing the word "Ivanka" (or so people on Twitter think).
Go ahead, take another look.
Moments after he supposedly mouths the president's daughter's name, the clip cuts to a moment where Hillary turns around and sees her husband pondering into the distance.
When she catches Bill gazing googly-eyed into the abyss, she pauses for a moment.
As a woman, I know that stare. That's the "I'm kind of pissed off, WTF are you looking at?" stare.
Then, she turns around with a bewildered look on her face and goes about her business.
C'MON, MAN. WHAT ARE YOU DOING?!
Hillary was probably having a rough day already, but the fact her husband might've just checked out Ivanka Trump on national TV probably made it a whole lot worse.
Those who saw the aired moment already took to Twitter and said they think Bill was checking out Ivanka Trump.
It looks like he's been caught by the masses.
If he really was staring at Ivanka, like everyone thinks he was, he's definitely brave, considering Michelle Obama was standing right in front of him.
Michelle knows all.
I supposed we'll never know what Bill was staring at and why Hillary looked so mad, but I sure hope it wasn't another woman.