My heart is broken

[sprinkles104]

My husband and I quit smoking together.  Everything was going great.  I just found out last night that he's been smoking for a week now.  I'm so upset.  He was doing so well, but I did feel he needed emotional support that he refused to get.  He said he wants to start his quit again.  What can I do to increase his chances of staying quit?  I'm so sad......