It is unlikely that someone's ex girlfriend cheating on them with one of their close friends would be understandable because it breaks the trust which is usually present in those types of relationships.
Context: My ex girlfriend cheated on me with one of my closest friends.
Hypothesis: Yeah, I can totally understand how my ex girlfriend could cheat on me with one of my closest friends

Given this context, is the hypothesis true (Yes/No/I don't know)?