I don't understand why the fiance does not ask the family how they came to know that he is Elly's fiance. He lies to them that he is her brother. So if they knew that he is the fiance, then Elly is the only likely person to have told them.
Why did he not ask them that?????
The subject of their engagement does not come up until he leaves the house to make a phonecall on the landline.
He really becomes suspicious after the old woman tells him Elly was a newly wed.
Meanwhile, Ahmed or whoever drives back to the sea villa without him leaving him to walk back to the house. Ahmed tells everyone he has found out and they all start to panic.
When the fiance returns there is a silent bit where we do not here what is being said between all the men. We have to assume that at this point the fiance owns up to being a fiance. After this silient bit then we here the men denying that they would bring a fiancee on holiday with them.
The fiance then asks Sepidaa if she mentioned a fiance or gave any resistance to coming.
fiance = male
fiancee = female