[Hugh R]

Live as in rent-free? Maybe you get to buy all the food as well? My 81 y/o MIL lives with us because she let herself be brow beaten out of her life savings over the last two decades by my evil SIL so she could support her out of control lifestyle. The MIL is not a real burden, but at 81, she doesn't give a rats ass about anything. She makes herself breakfast or lunch when we're gone and leaves a mess in the kitchen every single time. She runs down the A/C or runs up the heat cause she wants to leave her outside door open for her rat dog that craps in my house and all over the lawn.

My point? No one gives a rip about your house, especially when they're getting it for free, its not their house.

What are they doing with two infants that are 8 and 14 months old if they can't afford to take care of them on their own dime, including shelter? Maybe they should give them back?
Maybe they shouldn't be "life partners' if they can't do it on their own dime?

I didn't see in your post a time limit, so I'm assuming its because they are down on their luck or whatever. If you had stated two weeks or a month that would be one thing, but you didn't so I'm going to assume no time limit has been put forth (years?).