You try and help them. How much, depends on your commitment and will. The preferable is you try and take them in, and foster.
How big/old are the kitten as you can judge it?
CAN you come near and touch her kittens? As the TS apparently could if she wished, but wasn't unsure if she dared.
I presume you are already helping the mom with food? How shy is she to you? The photo is a relaxed postion form quite near, so I presume she isn't totally shy??