Alexa felt like someone struck her heart with a thunderbolt. She was feeling so embarrassed for herself for believing in Alastor.
And in the meantime, her eye met with Diana who stood close to Alastor. She had a prideful expression as if Diana was aware of Alastor's and hers relationship but she kept herself neutral because she already knew Alastor was bound to get married with her.
Alexa picks her fork and tears open the piece of steak in rage and engulfed it in her small mouth. Seeing her acting vigorously Fiona felt sad. She wanted to inform her about Alastor's relationship with Diana but she thought Alexa must be knowing. But now that she observes, Alexa wasn't aware of Alastor's relationship with Diana.
COUGH COUGH!!