From Love-shy.com wiki: A wiki for the dating-challenged
Married involuntary celibacy, married celibacy, or marcel describes a state of being involuntarily celibate while married. In sexless marriages, one or both partners may be marcel, but this is not a requirement.
Unlike non-married involuntary celibacy, the marcel spouse's only escape is divorce if he or she cannot resuscitate the marriage and the spouse is unwilling to allow an open marriage. For various reasons, this may not be possible, effectively trapping the marcel spouse in an incel state.
For more information, see sexless marriage.