Ah... Yes. Highly possible trope which I hate. It's so generic that it feels disgusting. BUT ALL OF THAT CAN BE PUT ASIDE AND IGNORED AS LONG AS WE CAN SEE UNCENSORED LILIA.
Seems possible he's out of the picture. She didn't even have a ring (had me going "no ring? YOOOOO last chapter), and was lovey-dovey with someone over the phone. Unlikely its MC's dad.