When Cem told Savas that Yasemine was pronably sleeping with someone else. Savas told him she was not that kind of girl. Remember later on he said when they met that he understood that she was hurt. So that means he recognized she was not that type of girl but she was just hurt
Yes - he felt this woman was hurt and that she was also in her late 20s and was still a virgin so for those 2 reasons he knows that she doesn't sleep around!
I loved the way he had said - she's not that type of girl. Defending her already!