1. The matter is really worsening they should be warned of the consequences of their actions.
2. Though on the basis of your version criminal case u/s 498A IPC can be filed on your husband and in laws but that may result in breaking of marriage.
3. Hence I would advise you to file case under PWDV Act praying for maintenance. This would be warning of sorts so they restrain themselves from indulging in further illegal activities and your marriage may not also be broken.