Complex sentence: Soon later Juan Miguel finds out that Lirio is Marichuy, and Omar finds out that Juan Miguel was the father of Marichuy's child and husband, knowing this Juan Miguel and Omar are no longer friends.
Split into simpler sentences: Soon later Juan Miguel finds out that Lirio is Marichuy, and Omar finds out that Juan Miguel was the husband of Marichuy and the father of her child. Knowing this Juan Miguel and Omar are no longer friends.