How do I get rid of my in-laws?

I have been turned into a squatter in my own house; two of my wife's
rude sisters who are employed insist on staying with us but never
offer a cent to help with the house budget.

Worse still, my wife's cousins keep popping in and out. As we speak, one has been camping here for the
past two weeks.

What annoys me is that as a result, the house help now sleeps in the
sitting room, which means I can't come home late because she will be
there in her night dress.

As if that's not enough, our five year old daughter now sleeps
in our room encroaching on my conjugal rights.