ANSWER:

Yes, they will be together after he does his time in hell

She can intercede for him and it is up to Allah to accept that.

QUESTION: If in a married couple one of the spouse goes to hell to expiate his/her sins and then goes to Jannah, will the couple still be married in Jannah or will they have different spouses? If one goes to hell, can the spouse intercede in his/her favor to avoid hell and be married in Jannah?