Pls help me decode Khun Pin's question in Episode 15

Hi, guys!

So, I came across a clip from TLP's episode 15 while scrolling facebook. It is from the scene where after coming back from Hua Hin and reuniting with Khun Pin, Anin is feeding her rice porridge and Khun Pin's jealousy resurfaces and she is asking Anin all these questions.. Lol.

I realized that even while watching the series when it was on air, I couldn't make any sense of the following dialogue:

Khun Pin: Was the sea in Hua Hin very fair this time? Anin: Well, not so fair. But quite clear indeed.

Can anyone please explain what do these coded sentences mean??? I will be really grateful!