Over worked, over stressed... And now over weight! Anyone else?

Hi,
I am a 40yo working mum of 2. I am starting a 5kg loss challenge - and I think the biggest part of the challenge is fitting it around insufficient time to prepare proper food, and 'reward' eating at the end of a long day... Add to that various birthday parties etc and the road to success is pretty daunting! Is anyone else up to joining me as a 5kg weight loss buddy?