FF13 Sazh & Vanille, people who have betten the game please answer! SPOILER?

ok i just saw Sazh's son (Dajh) get turned to Crystal, he watch the clip of vanille an fang. what i don't get is that Sazh is mad at vanille but its kinda Dajh's fault right? He walked in on Vanille and fang and Dajh saw the explosion and turned to a L'cie. it wasn't vanille and fang that did it. but then vanille run an sazh runs after her but when he caught up to her he wants to shoot her then he summons the bug guy, After i defeated the big guy sazh then points the gun at her and then puts it to his head and makes it look like he shot himself(but he really didn't) so now their in the prison and they talk why did sazh get mad at her? why ddidn'tshe say sorry for what hhappened are they still friends? they don't really talk to each other after that.