Maybe, His mom was Taker's first love but she got banished and became human. She probably loss her memories . She didn't remember Taker and all the angel stuffs.
Chances are the reason she got banished was that she fell in love with a human and was pregnant. They probably gave her options of taking the baby's soul or get banish, and well she chose to get banish.
I got most of these from mun_ree on IG, they summarize every raw chapters. If interested, check them out.
Since now they have the little angel, they cant have sex that much, and Gok was worried about their intimate life. He was also worried about his look, he gained some weight and thought that he now looks unattractive. Apparently that girl is his "sister" and wanted to meet a vampire baby, her "nephew". She might be a vampire too, we dont know yet. Bin said he will introduce them later and told her to go home, if she won't, he will tell on her(idk to who). She sulked and said she will go home. Bin walked her home. Gok's friend misunderstood and said that they are in front of a hotel. Gok said that he trusted Bin.







Same eyes color... maybe siblings?