Guys some of you wondering Judith's father. I just say my idea, her father is Rick. But there is mystery so we discuss it i will write reasons of for Shane or for Rick. Here is the reasons of Rick
1-Just a little bit before the apocalypse,Rick and Lori's marriage had some problems. Also Rick argue this with Shane remember first episode beginning. But when Rick woke up and escaped Atlanta and found Lori and Carl,they marriage became stronger and Shane-Lori relationship became very poor. So in this time Rick and Lori probably having special things you know 😁.
2-Also when Rick came the camp and went CDC with group, Jenner take blood sample of whole group but Jenner couldnt find Lori was pregnant. If Lori was, Jenner could see on the test results of blood sample of Lori. Jenner said Rick all of them is infected but he cant understood Lori was pregnant. So that means when Shane and Lori was very close,Lori was not pregnant. After Rick came, Lori became pregnant. Also Lori and Shane not attract each other anymore. So probably her father is Rick.