<human>: Throwaway because my husband knows my reddit account. 

I am married to Chris. His brother is Tyler. Tyler has been an alcoholic since I have known him (6 yrs). He recognized the problem around 3 years ago and has been in and out of rehabs ever since, not being able to complete a full program. He has consistently stolen money from his brother Chris and alcohol from our home to feed his habit. 

Last year he got into a hit-and-run DUI situation and had two choices: face jail for 180 days, or complete an intensive DUI court program. He chose the DUI program and immediately checked into a residential rehab. Fast forward to now, his rehab program is coming to an end, and he asked my husband if he can move in with us until he is able to get back on his own two feet. He also stated he wanted to bring a girl he met in the rehab clinic, who is a recovering heroin addict. 

Keep in mind, before his current rehab program, I have never seen Tyler stay sober for more than a couple weeks. He also pretty much abandoned his daughter, who is 4.

I am no one to judge, and I want to be here to support him and his new girlfriend, as I understand it must be extremely difficult to overcome such an obstacle, however I do not want me or my husband to be seen as a doormat. 

My brain is extremely fuzzy and I am coming here because I am not sure what would be the right or wrong thing to do.

Can you give me the gist of the text in a nutshell?
<bot>: BROTHER-IN-LAW IS A RECOVERING ALCOHOLIC WHO WANTS TO MOVE IN WITH HIS NEW GIRLFRIEND. NOT SURE IF I CAN TRUST HIM.