Peanut and I were walking, all of a sudden a lab mix jumps out on us. She is very sweet only has a flea coller on

Then she followed me...all the way home lol. I gave her some food and she didnt even chew it, i think she has been on the streets a couple days, but im not sure bc bigger dogs are usually pigs. Hard to tell.
Now she is on my patio looking at me. What do I do with her? How should I go about finding her parents? What if they dont want her? Ughh what to do?