My question involves divorce in the State of: Illinois

My husband wants to get added to the Title of my house. It is currently paid off and has my father and my name on the Title. I purchsed the house with my previous husband in 1987. In 1997 I got a divorce and purchased my ex's portion of the house. I was able to quit claim, (with my Dad's help financially) therfore keeping the same mortgage payoff timeline.

I remarried in 1999 and the house paid off in 2009. My current husband wants to be on the title. If we get a divorce is the house worth divided 3 ways? Basically is there a reason that I should/should not add him to the title?

Thanks