All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
As for the ruling of this marriage, if it has met the conditions of the valid marriage, the most important of which are the Wali (guardian) and two witnesses, then it is a valid marriage. Not telling your husband about your real age and that you are a year older than him has no effect on it. This (i.e. being older than your husband) is not a legitimate defect for the Prophet, sallallaahu ‘alayhi wa sallam, married Khadeejah while she was many years older than him, and you are only one year older than your husband. For more benefit, kindly refer to Fatwa 83629 about the conditions of the valid marriage.
You have done well by seeking to fulfill the rights of your husband in the best way. This is what is expected from the good Muslim woman. Allaah The Almighty Says (what means): {So righteous women are devoutly obedient, guarding in [the husband's] absence what Allaah would have them guard.} [Quran 4: 34]
Ibn Katheer said regarding the interpretation of that verse: "Devoutly obedient means obedient to their husbands, as Ibn ‘Abbaas and others stated. {Guarding in [the husband's] absence} according to As-Suddi and others, means that she protects her honor and her husband's property when he is absent. {What Allaah would have them guard} means: the guarded (person) is the one whom Allaah guards." [ End quote]
Based on this, we advise you to remain firm in your behaviour. As for the sin you mentioned which is lying about your age, if you have repented from it and asked your husband to pardon you generally, then this is sufficient, Allaah Willing. But, do not tell your husband explicitly about this sin again or make a reference to it for he may assume about you various assumptions and think about something worse than that, and thus dissension occurs and the whole family breaks up.
Finally, do not think much about that nor ask other scholars to get different opinions lest this may prevent you from paying attention to what is beneficial for you in your life and religion.
To know the general conditions of repentance, kindly refer to Fatwa 86527.
Allaah Knows best.