"being able to respectfully but firmly express feelings and ask for support helps you manage tricky situations that affect your ability to stay on plan. For instance, have you been urged to take seconds at dinner, faced skepticism about your need to go to the gym? Learning to advocate for yourself and not put others needs and feelings first can help you feel more in control of your plan and better poised to reach your goals."
In the Weight Watchers Weekly for this topic if gives a model that follows D E S C -
Describe (the behavior you want changed)
Effect (explain the effect it is having on you)
Specify (what you want or need to change)
Consequences (clearly state the consequences for you)
Remembering that putting yourself first and asking for what you need or want is not a bad thing and doesn't make you a bad person. In my opinion it becomes a reminder to those around you that you respect yourself and they should respect you too. I've heard so many times in my life that "if you can't take care of yourself, you can't take care of others" and I believe in it. Following a weight management plan such as Weight Watchers or any other is a time commitment to yourself, dont sell yourself short. Invest the time and make the requests to keep the momentum of success going!
Source - Weight Watchers Weekly - July 2-8 2017