Re: Need some follow up advice
Based on the one scenario that you have explained and given that, as like you say, it has always been a rule to not have phones at the table and she has wilfully either been on the phone or had by her at the table, I would say you need to stick to the rule. It is known and in place and to let it go now would be a sign to say it's ok.
How you go about that is really determined upon you and your relationship as to the enforcement. I too have been in the scenario of getting ignored and the distance until I couldn't take it and caved in, me the one then grovelling and making apologies, and that is neither good nor helpful. So would you be able to approach it in a discussion manner, bringing the subject up perhaps asking if there was a specific reason it was necessary to maybe find the starting point as that may be an opening method without it turning into an aggressive situation.