She may put on a front on when she's actively with them but she's not hiding her emotions or putting on a strong front (and nor should she) because it's all laid out bare in her Tea with Tiffany videos which I'm assuming her family watch.Do you guys think that Tif just puts on a front in front of Matt and family members so that she is appearing strong? She did say she hates seeing other people upset.
She has shown her emotional side in these videos and has spoken openly about her fears. She's also broke down and cried in these videos.
They must see her 'sad face' thumbnails too. She just curates it to look like she's having a cosy one to one with her 70k plus followers but there's no way Matt and her family are not seeing this footage of her upset and in tears.