I read somewhere above that in case she doesn't yet sleep naked, the smoking dialog is automated and she will do so after that. I can't confirm it however, in my case I already had her sleep naked before that. Not sure if that works, I haven't tested it.
Anyway ... there is an alternative "showdown" route in the living room, maybe that's what you need to do. For that you need Lisa's help. She will give you the finger of course, but on Monday, when she is in the kitchen, look for her phone in her bedroom.
Check the walkthrough for more details.
After Max was accused of stealing. There are three ways:
1) If both photos have already been taken of Eric. After the family starts talking to Max again, Alice will sleep naked by default. If this does not happen (the probability is close to zero) Max can trade with Alice again and force her to sleep naked. Then act as described in the guide.
2) If a photo was taken of Eric or not taken at all, but the "blackmail material on Eric " opportunity has started. Max must use the second method described in the guide
3) If he has been slandered and the "blackmail material on Eric " opportunity has not started before, Max can not prove his innocence and will be sent to camp.
Tip: Time is also important on the first and second routes, and Max must act fast
P.S: and again , Thank you so much for helping others