pull out denial
A pull-out denial is typically when a character, while being on the receiving end of sexual intercourse with someone, obstructs or otherwise disables the other character's ability to pull out, who is forced to ejaculate inside of their partner regardless of whether they were willing to or not. This is, in a majority of works, typically accomplished by locking the legs around the male or penetrating character's lower back.
Pull-out denial is not necessarily indicative of non-consent.