As an adult child of an alcoholic i encourage your family to find a really good family counselor. The goal should be to help your kids figure out what healthy relationships are... Right now they are basing their belief system and reality on what was an illusion. The last thing you want is your child to be drawn to "good time charlie" as she is hard wired in childhood to be attracted to.
This is what happenedto me and fortunately my kids are very wary of addiction... However...even with honesty and counseling they are scarred... Its a camily diseAse.
We are as sick as our secrets... Don't expect honesty and transperancy from kids whose parents didnt model it.