sentence: An incredulous Roger learns that Alyssa has been with Diane all this time and it becomes apparent to them that Thomas, Amanda and Alyssa had orchestrated their meet-ups all along, about which the girls are extremely smug.
modified: fix grammar: An incredulous Roger learnt that Alyssa had am with Diane all this time and it became apparent to them that Thomas, Amanda and Alyssa have orchestrate their meet-ups all along, about which the girls was extremely smug.