Hey, she doesn't want any trouble, and Silas doesn't trust most of the group. He has a kind of truce with Skelly, and doesn't like the chances of the distress beacon.
Ooh! Shall I reveal Gina's plot twist yet? Nah... I'll hold off until someone tries to do something dumb. Like kill her!
It is actually possible to achieve negative ph. The ph scale being limited only between 0-14 is a misconception.