My parents in law came to visit in the summer; they stayed a 2 months..

they are planning to return and stay three months next time;

they were told at the Swiss Embassy that they can apply for a visa to remain for six months the third time around (a reward for good behavior)$ I guess)

....
I am building a shed in the garden to hide from the in laws during their next visit .... will be installing electricity and plumbing for their third ...