Translation of Schwiegervater

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.
Seldom only do such incidents occur, thank God, but the fact is that these incidents, which are started by a relatively small group, need to have a broader support among others in order to exist.
The ferry took me to the island. Sitting next to me there was a local guy with two packs of beer, and he seemed pretty drunk for this hour of the day. He offered me some beer and I was polite.