She'll probably bring them to you when they're old enough to travel. Probably around 6 weeks. I'd suggest following her back to them and seeing if they're ok. Don't go into someone else's yard or anything, but see if you can find out where they are generally. That way you can keep an eye on them just in case.
It also might be that she is someon'es outside cat...which, since she's not spayed would be irresponsible, but. *sigh* maybe put a collar on her with your phone number written on it in marker? That would be a quick way to find out if she has an 'owner'.
If not, then I'd say kidnapp her ASAP! Find out where the kittens are, bring a carrier, and take them, and mum-cat inside. If you put her in a small extra room or bathroom and set her up nicely then she should be very happy and you'll get to make sure the kittens are socialized. It will be MUCH easier to socialize them under 6 weeks, so I'd aim for this if you possibly can.
It also might be that she is someon'es outside cat...which, since she's not spayed would be irresponsible, but. *sigh* maybe put a collar on her with your phone number written on it in marker? That would be a quick way to find out if she has an 'owner'.
If not, then I'd say kidnapp her ASAP! Find out where the kittens are, bring a carrier, and take them, and mum-cat inside. If you put her in a small extra room or bathroom and set her up nicely then she should be very happy and you'll get to make sure the kittens are socialized. It will be MUCH easier to socialize them under 6 weeks, so I'd aim for this if you possibly can.