What if the boy is 16 and the women is a teacher assistant at another school 23 years old buying gifts for sexual intercourse and asking for oral favors, and it goes on for 2 years and a child is born? what is the limitation on a sex offense like this?

§ 15‑1. Statute of limitations for misdemeanors.

The crimes of deceit and malicious mischief, and the crime of petit larceny where the value of the property does not exceed five dollars ($5.00), and all misdemeanors except malicious misdemeanors, shall be presented or found by the grand jury within two years after the commission of the same, and not afterwards: Provided, that if any indictment found within that time shall be defective, so that no judgment can be given thereon, another prosecution may be instituted for the same offense, within one year after the first shall have been abandoned by the State. (1826, c. 11; R.C., c. 35, s. 8; Code, s. 1177; Rev., s. 3147; 1907, c. 408; C.S., s. 4512; 1943, c. 543.)

§ 1‑17. Statute of Limitations Civil Action "Disabilities" See #1 below

(a) A person entitled to commence an action who is under a disability at the time the cause of action accrued may bring his or her action within the time limited in this Subchapter, after the disability is removed, except in an action for the recovery of real property, or to make an entry or defense founded on the title to real property, or to rents and services out of the real property, when the person must commence his or her action, or make the entry, within three years next after the removal of the disability, and at no time thereafter.

For the purpose of this section, a person is under a disability if the person meets one or more of the following conditions:

(1) The person is within the age of 18 years.

(2) The person is insane.

(3) The person is incompetent as defined in G.S. 35A‑1101(7) or (8).

(a1) For those persons under a disability on January 1, 1976, as a result of being imprisoned on a criminal charge, or in execution under sentence for a criminal offense, the statute of limitations shall commence to run and no longer be tolled from January 1, 1976.

Up to 3 years after the minor turns 18

(b) Notwithstanding the provisions of subsection (a) of this section, an action on behalf of a minor for malpractice arising out of the performance of or failure to perform professional services shall be commenced within the limitations of time specified in G.S. 1‑15(c), except that if those time limitations expire before the minor attains the full age of 19 years, the action may be brought before the minor attains the full age of 19 years. (C.C.P., ss. 27, 142; Code, ss. 148, 163; 1899, c. 78; Rev., s. 362; C.S., s. 407; 1971, c. 1231, s. 1; 1975, c. 252, ss. 1, 3; 1975, 2nd Sess., c. 977, s. 3; 1987, c. 798; 2001‑487, s. 1.)

Indecent Liberties with a Student [GS 14-202.4, Class I felony or A1 misdemeanor]

Indecent and lewd acts by a teacher, administrator, or coach with a student at the same school, when the perpetrator is 4 or more years older than the victim (Class I felony) or less than 4 years older (Class A1 misdemeanor).

§ 14‑27.7. Intercourse and sexual offenses with certain victims; consent no defense.

(b) If a defendant, who is a teacher, school administrator, student teacher, school safety officer, or coach, at any age, or who is other school personnel, and who is at least four years older than the victim engages in vaginal intercourse or a sexual act with a victim who is a student, at any time during or after the time the defendant and victim were present together in the same school, but before the victim ceases to be a student, the defendant is guilty of a Class G felony, except when the defendant is lawfully married to the student. The term "same school" means a school at which the student is enrolled and the defendant is employed, assigned, or volunteers. A defendant who is school personnel, other than a teacher, school administrator, student teacher, school safety officer, or coach, and is less than four years older than the victim and engages in vaginal intercourse or a sexual act with a victim who is a student, is guilty of a Class A1 misdemeanor. This subsection shall apply unless the conduct is covered under some other provision of law providing for greater punishment. Consent is not a defense to a charge under this section. For purposes of this subsection, the terms "school", "school personnel", and "student" shall have the same meaning as in G.S. 14‑202.4(d). For purposes of this subsection, the term "school safety officer" shall include a school resource officer or any other person who is regularly present in a school for the purpose of promoting and maintaining safe and orderly schools. (1979, c. 682, s. 1; 1979, 2nd Sess., c. 1316, s. 9; 1981, c. 63; c. 179, s. 14; 1993, c. 539, s. 1132; 1994, Ex. Sess., c. 24, s. 14(c); 1999‑300, s. 2; 2003‑98, s. 1.)

I would strongly urge you seek advice from a private attorney or have a discussion with the District attorney in your area. We can not give legal advice.