Your in-laws will probably appreciate this approach much better, too. Most people shy away from the idea of having friends over when their in-laws come for a visit. Having other people around at the same time that your in-laws are there is actually a great idea because it can buffer any kind of tension or awkwardness that either of you feel and it encourages everyone to be on their best behavior. It's almost a surefire way to keep resentments in check and hostilities at a minimum. It also gives you extra emotional support during this stressful time.
Every good performance has an intermission.
The same is true when you are hosting your in-laws. Be sure to schedule quality time alone with your spouse and do not hesitate to take a timeout if arguments or conflicts arise. Everyone will be able to think and communicate more clearly when they are calm, cool, and collected. After the Visit Do not expect your in-laws to like all of the ways that you and your spouse live your lives. They probably will have some complaints about how the house is kept, how the dishes are washed, how the furniture is arranged, how you wear your hair, how your kids are being raised, etc.