My question involves an eviction in the state of: Michigan

In Oct 2006 my husband signed a lease agreement with my father in law (for a term of 8 years) to lease his parents house for $0 per month. we pay ALL utilities and maintanence. The arrangement was when we sold our exsisting home that we left to move in to his we would pay him for his house.

Unfortunetly for everyone involved the housing market in Michigan isnt very good, so its taking longer to sell our original home than anyone thought. We have even dropped the price below market costs to try and move the house.

Our original home that we left is occupied by a renter that has signed a rental agreement with us that she will vacate our home when we sell it.

My question is hopefully really simple, since we have a signed lease from my father in law, my understanding is as long as we dont violate the lease he cannot evict just to gain his home back. He must show some cause.

Any help on this would be great, Its hard to imagine how nasty a family eviction could be. We have two small children (his grandkids).

We have the lease which was signed by my husband and father in law, and we have other family members who heard his verbal contract with us as well at the time of the signing.

Thank you so much