i told a small fib to my kids about their dad

so there was this girl i met at my kid's school event like a year ago. we clicked instantly and started talking all the time, really hit it off. one day out of nowhere her ex-husband shows up out of the blue wanting to get back together or some bs nonsense. she was heartbroken but didn't want him around kids, so i kinda stepped in as friend support. we got closer, started hanging out more outside school stuff. then one night over drinks it came out she liked me too and not just for support friendship reasons. turns out her ex had been harassing her bad lately trying to make a scene at work or wherever so they split up quick and final after that drama. long story short, i kinda took advantage of the situation, like moved things fast while she was still reeling from all this nonsense with her ex. it felt wrong but exciting at the same time, you know? now i tell my kids their dad is just in another state or something cuz i don't want them knowing yet until i'm ready to come clean properly. yeah i feel guilty but i also kinda like how things are right now.