Delaware Code Title 11. Crimes and Criminal Procedure § 453. Circumstances negativing consent as defense

(1) It is given by a person who is legally incompetent to authorize the conduct charged to constitute the offense unless the defendant believes the victim is legally competent; or

(2) It is given by a person who, because of youth, mental illness, mental condition, mental defect, serious mental disorder, psychiatric disorder or intoxication is manifestly unable or known by the defendant to be unable to make a reasonable judgment as to the nature or harmfulness of the conduct charged to constitute the offense; or

(3) It is given by a person whose improvident consent is sought to be prevented by the law defining the offense; or

(4) It is induced by force, duress or deception.