I truly wonder why the rumor thing was brought up in the book honestly. I know it might just be people just gossiping for the sake of it or people getting bored and wanted some entertainment but...
The people on the Vat weren't normal people. These were people who had published academic papers, these were professionals with Ph.ds or maybe Nobel Prize awards to their name.
These people knew that they couldn't simply draw assumptions without any evidences to back it up. These people's jobs were basically to research and observe things closely before making any conclusions. These people wouldn't make any claim without knowing what they were talking about.
For sure they would not say that they notice something weird about Grace and Stratt's relationship just for the sake of having something to gossip about. And the fact that almost all scientists on board thought they have a weird thing going on didn't really help the case. And Grace admittedly saying in the book that he was always at Stratt's side, that they see each other everyday, that he is her little science lapdog, or that their house in Baikonur is literally next to each other, really does not help him beat the allegations surrounding them.
And what was up with DuBois not elaborating why he thinks Grace is somewhat special to Stratt? Like what prompted him to come to that conclusion? Let's talk about that! (I have a theory though what it is but I'm writing a fic about it so maybe I'm going to gatekeep it for now)
The existence of the rumors was proof itself that they have a vibe between them that couldn't be ignored by the people around them. And considering the movie, yep, they certainly have that weird vibe to them.
















