A Man transubstantiates into a Husband. He has the accident (appearance) of a Man, but is fundamentally transfigured into a Husband.
Consider this definition of what happens in the transubstantiation of bread and wine to the real presence of the body, blood, soul and divinity of Jesus Christ during the Holy Mass:
The complete change of the substance of bread and wine into the substance of Christ’s body and blood by a validly ordained priest during the consecration at Mass, so that only the accidents of bread and wine remain… After transubstantiation, the accidents of bread and wine do not inhere in any subject or substance whatever. Yet they are not make-believe they are sustained in existence by divine power. (Etym. Latin trans-, so as to change + substantia, substance: transubstantio, change of substance.) [from CatholicCulture.org Catholic Dictionary: https://www.catholicculture.org/culture/library/dictionary/index.cfm?id=36918]
In a real sense, a Man transubstantiates into a Husband in the Sacrament of Holy Matrimony. While he may appear to be a Man, a Husband is not a Man. He becomes a Husband in the appearance of a Man. This is why, just as the Eucharist must be “unleavened, purely wheat,” and the wine must be “must be natural, from the fruit of the grape, pure and incorrupt, not mixed with other substances,”* so must a Husband first be a Man.
[From Redemptionis Sacramentum]