I wonder what would be the parents' reaction if their daughter-in-law too starts kissing and hugging their son in front of them?
take off the "SAAS-BAHOO" ainak (glasses) and look at this. Kissing and hugging parents is totally different than kissing and hugging wife. Factor of intimacy jumps in wife's case and things can go out of control.
I find it strange that you (girls) find it perfectly normal to kiss each other (friends hugging and kissing on cheek) when you (again not you but girls) meet but its hard for you to swallow when parents hugs and kiss their son.