Vanessa is smart. It's been clear from day 1 of feeds that Audrey and Clay are each other's ride or die and their plan is to take Shelli with them to F3. The main alliances right now are Clay/Audrey/Shelli and Shelltown/Liz. Everyone else is more or less playing between them with varying results.
The reason Audrey is such a lynch-pin with people is because her revealing herself on day 1 as transgender paints her as a honest and trustworthy person on first sight. Contrast this to Frankie's Ariana reveal which basically lost him points with the entire house last season

Even now, you can see Austin doesn't want to dash all hopes of an alliance with Audrey - which is a credit to how ingratiating she can be to people without trying.
If I was in the house right now, I'd be trying to get Vanessa, Austin, John and Becky into an alliance - maybe playing one of the High Rollers (likely Jeff, he seems to be the outcast but he's secure with Clay) for info.