Short answer? You don't! You let them find out about your sister on their own (and they will, eventually). Continue your regular (hopefully good) relationship with your in-laws as you do now.
Some do and some don't . If you are the fiancee I suggest to you that a tiger doesn't change it's stripes. In other words, he will cheat in any relationship. He is probably very self centered, controlling, and narcissistic. Know this if you marry him.
Well technicaly it is her godmother!!
no
There is no relationship. You do not share a common ancestor. The connection is simply through marriage.
Well, if you really do love him then you will forgive him for his wrong doings and move on with your relationship.
That all depends on the people that make up that relationship.
WHAT DO YOU DO ABOUT A NEWS LOVES COMING UP IN YOUR NEW RELATIONSHIP?
The brothers of your spouse are your brothers-in-law. Also, the husbands of your sisters are your brothers-in-law.
They're afraid of what they're husbands/boyfriends will do to them or their friends/family if they leave.
He is brother your brother in law.
Your husband's third cousin is just considered your third cousin through marriage.
NO. any person who is truly professional does not mix work with relationship. even if his wife is his PA they should have ONLY a professional relationship at work.