 "Sí !"Bartolomé's face was as flushed as Bayliss' now.
No! Bartolomé's face relaxed until only Bayliss' was flushed red. 
mnli hypothesis: No! Bartolomé's face relaxed until only Bayliss' was flushed red.  premise:  "Sí !"Bartolomé's face was as flushed as Bayliss' now.