Everyone tells the different story!!

This is a story between my friends "L" and "C", and it was happened in their trip in UK.
In fact, they concealed to me about the trip until L told me. After I heard about that, I was thinking in my mind, "haha, you two might be get some knot when both of you come back from UK".

Actually before their departure, L asked me "what tiny details should I be careful when I travel with Miss C". I told her " you shouldn't be worry about her, because she is a nice travel companion. If you go together, she will make you save money." Since many years ago, I have a travel experience with Miss C in Tokyo. I know what exactly will happen in travel with "Miss C". I say so because C has some personality knotty. I told L before the knot was happened between C and me, and L was hold a questioning attitude towards about my words. Perhaps everything I told L that she never believed me. Maybe It was a reason I didn't want to tell L the truth when she asked me. However, everything I said was proved I was right. I'm not sarcastic, I just know it. As for what exactly happened between them that I have no comment. The problem I try to point out is, both of them do have some personality issues. This is the reason they occured knots. After their travel, they both complain to me some about the other's. To L, I just told her, "I used to tell you, and you wasn't believing me."  As to C, I told her in official statement way. "Don't let the unpleasant influence both of you".
 
After the several conversation between three of us. I'd just wondered, why did they have different speech about that trip? It's my turn to call into question them. I had used "seemingly harmonious" to indicate the relationship between the three of us. When the lies spread in between us, the trust between us has long been severely damaged. I don't even know what am I writing. The only thing I know is they won't get my trust anymore.