Hi London,
Am I correct in understanding that:
- Your wife's father is the owner of the property you are currently staying at?
- Your wife's father turned off the utilities after your wife (his daughter) moved out?
Have you made any contributions to the house? (e.g. mortgage repayments, renovations of value)
If you paid no rent, then this is unlikely to be a tenancy situation. Unless there is a possession agreement between you and the father you can point to (written or oral) then the owner is within his power to do as he pleases to his property.
It's probably best to speak with the father and agree on some interim tenancy payment under which the utilities are turned back on. I suspect this has something to do with you getting a separation from your wife and the domestic tension between you and his daughter. Best way is to resolve the tension as it appears to be a family matter.