He is getting tired of hearing everything is going wrong over here. Which is understandable .. he can do buggeroll to help her from where he is, so what is the point of her telling him that the lawn has to be mowed??
Umm, speaking from personal experience, she probably just needs to hear him say "I'm so sorry sweetie that you have to deal with all of this because of me being away. It's not fair on you. Is there another way we can organise to get it done so it's not such a hassle for you." Seriously she probably just needs some recognition from him of the fact that he's off working having the biggest holiday of his life from family life and she's bearing the brunt of it all!!!