The opening through which the urine passes is known as Urethral Orifice or simply, Orifice. Though the term is applicable for both the sexes, the Orifice term is usually used more frequently for the urethral opening of female sex (for male sex it is Urethral Meatus which is.....understandable to say the leastOrifice?
There have been a few extra pages, but the author is currently focusing on the half-succubus series.@Sullieman is the author still writing?