I am also a mother so I really understand this. You can't take care of the kids if you don't take care of yourself. Retreating to take a relaxing soak in the tub is nothing to feel guilty about. It is a far healthier way to cope than retreating to a bottle.
I am only on my 9th day sober but for the first 5 days, I only left the house to go to AA. Spent the rest of the time on the couch watching tv. This weekend I was able to do things with my family but I needed that time to work on just me. Being sober is a work in progress and from what I am reading here, it does get better.