That's where boundaries are very important, especially if you WFH. For some people, they need a dedicated workspace that trains their mind that this is where I work and the only place I will work at home.

When I WFH, I work at the dining table, but I always make sure to clear up once work is done. Firstly, I need the space for dinner and secondly, out of sight, out of mind. If the laptop is not there for me to turn on or use, I wouldn't. Humans are resilient and adaptable, remind your friend that.