How would you handle grand-in-laws?

My fiance was raised by his grandparents because his parents were not fit to raise him. We are getting married in August. My fiance's grandparents are very nasty to me. They always call him up with blatant lies about me. They are constantly trying to talk him out of marrying me because his grandma has someone else in mind that she would like him to marry. Plus I know a dirty secret about them. They assume that I will tell everyone, when I haven't told a single person. My fiance pretty much lost contact with them for a couple months because of this.

To get to the point- His grandfather has been dealing with cancer for a couple years now. The doctors are saying that he could pass away any time now. Would it be right for me to visit with my fiance or should I send him on his own? I don't want to cause drama, but I do want to be there for my fiance and I also care about his family no matter what they've done.

You are very mature just to be entertaining the idea of seeing him. I think you should accompany you fiance. He might need your support.

You would be acting as a bigger person. One day you will never regret that fact that you didn't at least visit.

very sweet of u..
the best thing u can do.. is tell Ur to be hubby..
U don't want any drama.. and u want him to tell u what to do.. it is his choice.. if u go.. then go and keep Ur mouth shut.. take a back seat..

people w/ cancer live a long time now..
good luck

You should do what your fiance feels comfortable with.
I think you should absolutely go for the visit in the name of support, but if your fiance decides that he wants to see his grandfather without you, then wait patiently. If he wants you to go in with him, then go.
Perhaps, for the future, you should let the grandmother know that you love an respect her for who she is, and that it makes you sad that she doesn't feel the same way about you. Maybe she'll get off you're back.
People do awful things to each other. You just have to keep doing what you know is right, and you will never have to regret your words or actions. Good luck.