I own a home with my 2 siblings. One of my siblings is trying to force us into selling the home. What will she gain by taking us to court?

You don't provide much detail.  If all three of the siblings live at remote places from the home, probably none of you get much (if any) benefit of it.  A sale would make sense.  Without an occupant, the house will deteriorate and attract vandals, and will be uninsurable.  A sure loss at some point in time.  If you occupy the home but your siblings do not, then you are getting a benefit they do not.  It makes sense that they want to get their interest out so that they can put it to their own use.  You should buy them out, or agree to a sale.