Aside from the incident at Shiv's () wedding, Jess knows all of Kendall's secrets.

Source: https://collider.com/succession-season-4-kendall-assistant-jess/

At the end of Season 3 the Roy family's inner conflict reached a fever pitch when Kendall () plan to topple their father's rule of the company was undermined by a key betrayal from Shiv's husband Tom ().

Source: https://collider.com/succession-season-4-nicholas-braun-comments/

Despite losing the company to her husband, Shiv's baby will also likely be brought up as the face of the company's future as a next-generation Roy, thus allowing her to still have some sway over Waystar.

Source: https://screenrant.com/who-is-ceo-in-succession-series-finale/

Only time will tell if Shiv's power trip is built to last.

Source: https://www.slashfilm.com/1266160/succession-season-4-episode-5-unleashes-shiv-roy/

The fact that Tom is willing to go to jail and abandon his family to earn Logan's favor is a red flag that makes it seem like he prioritizes Logan's interests over Shiv's.

Source: https://www.cbr.com/succession-tom-shiv-relationship-toxic-red-flags/

There was a moment during Shiv's phone call to Logan where I almost couldn't hear her words over the sound of Sarah Snooks's Emmy being engraved.

Source: https://www.slashfilm.com/1253566/succession-season-4-episode-3-review-connors-wedding/

With his main protector gone, Tom is a little bit lost at the moment, and his surprising return into Shiv's arms seems motivated by genuine love rather than fear of losing his place in Waystar.

Source: https://collider.com/succession-characters-ranked-by-likability/