You shouldn't kiss your in-laws.
Vince is hosting a party at his house and his in-laws are coming over.
Vince wants to welcome his in-laws to his house.
Vince shakes his in-laws' hands and tells them to come into his home.
Vince kisses his in-laws and tells them to come into his home.
Vince's in-laws will think he is a polite and formal man.
Vince's in-laws will think he is too affectionate with them.