Translation of siluro

The mothers of my girlfriends were so insulted when I never wanted to eat their food. I mean, in the beginning they liked me, but once the saw my eating habits everything changed. I guess I blew it.
The climb was much exhausting than I had presumed. I had forgotten that we were at high altitude where there is less oxygen and that every step required double effort. It was a great exercise.
I was surprised that he charged 5 dollars extra (a total of fifteen instead of ten), because he had to take us to three different locations. I did not buy the whole thing and gave him ten bucks.