Don't really have any advice, my exabf was in prison for 16 months, I waited for him, nothing changed, he learned nothing, everything he committed to me while in prison was total BS.
Now, that does not mean that your husband will do the same thing, he may learn a life lesson while in prison, there is no way to know.
You might want to read the below post by Cycnical One, my exabf uttered at least 80% of them to me...
All I can say is: Trust Your Gut, and work on you...I wish I did!
Things Addicts Say From Jail
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Things Addicts SAY from Jail
1) THIS time is it/I'm done
2) I'll do ANYTHING you want if you go back with me/help me
3) You can hold all my money
4) I'll go to meetings/treatment
5) Give me a break
6) Work with me on this
7) I'm sorry, I'm sorry, I'm sorry
8) I want to quit, but...I can't do it without you
9) I know what I have to do
10) You drove me to use, I'm worse now because you put too much pressure on me
11) Don't abandon me
12) I need you as a friend
13) I wouldn't leave you in jail/abandon you if you were here
14) I don't belong here, I'm an addict, I'm not a bad person
15) I need to stay clean for myself
16) I'm getting too old for this $hit
17) I don't want to use
18) I've found God
19) I have a long climb ahead of me to get out of this pit I've dug for myself
20) Look at the damage I have done to (fill in the blank)
21) I am so far in debt, I owe so much to so many people who have helped me
22) I want to be respected and will have to work really hard to earn that respect back
23) I will do anything to make it right
24) I am going to kill myself.
25) I am so lonely in here
26) If you were the addict, and had this disease I would stick by you 100%
27) Forget the past and look forward to our future together.
28) I'm so ashamed
29) I will change
30) I'm hungry, can you put some money on my books