How to cope when living with in-laws?

My husband and I are newlyweds trying to get on our feet and have been living for the past four months in his parents’ basement. My in-laws have lived in this house for their entire married life (nearly 40 years), which means that my husband was born here and grew up here. We both want to get out and start our own independent life together. However, his parents are driving me crazy. I’m struggling to tolerate them at all, and spend much of my time in our little room downstairs trying not to say anything incriminating. What’s the best way to live like this? Is there one? Help!