Found grey cat and kitten - Alberta and 32nd Place

This lovely lady has been around the yard solo periodically for about 2 weeks but I haven't seen her every day. She is definitely wearing a collar. She showed up this afternoon with at least one new addition. She is aggressive and hissed at me, understandably - so I'm not sure if there are more because I didn't want to corner her. I wanted to pet that baby so bad ! I messaged the pdx cat trapper but they are catch and release - not ideal. I fed her some kibble and left some water out for them. I can't have cats for a number of reasons. Anyone know her? Have any fantastic suggestions? I am concerned about them with the neighborhood coyote activity. I don't have a live trap, etc. Original home life was clearly not great, so I would like to find the nicest place possible for them to land.