Martin was depressed by Devin's words but also upset by how he made him look like the villain.
"What did you want me to do? You watched him kick me out of Sabrina's life," he complained.
After waiting for so many years and even after Sabrina divorced, it took a while for her to warm up to him and when she finally did, Robin appeared from nowhere to kick him out of her life.
Devin explained in annoyance,
"I have no right to keep him from his unborn child."
Martin was angrier, yelling,
"And you know very well that is just a trick."
Devin's expression grew darker. If that hadn't happened, how would he have known that his best friend was a snake?
Thinking through the pros and cons, he was rather delighted by Robin's forceful actions.
"And I'm glad he pulled it off because I would never have known that you are a lying, conniving and sneaky bastard."