sigh
DS2 can be very single minded. He wants to talk about a certain thing or wants something in particular, and nothing but nothing else matters. The house could be on fire, and it simply wouldn't register with him. I can tell him "no" a million times, explain why not or why not now, and he just calmly returns to the same question/request without a blip or even seeming to hear me. It's maddening sometimes, and I swear I reach a point where I begin to wonder if I'm even speaking out loud. 
DH is going through a difficult time with depression - he went to the GP and asked for more counselling as last time it took them months to arrange it (even though they said he was at a critical level
and then it was only phone counselling and less than useless. GP told him that's all there is.
Not very helpful. But that means he's struggling, and I'm rather left holding everything down myself. And half the time when I've spoken to him about something, he doesn't even remember the conversation. So again... am I even speaking out loud that nobody hears me?
And DS3... well, he's 1. He does what he pleases, although he is beginning to figure out "no".. meaning now he's realising to wait until I'm distracted with something else and then go after something he's not supposed to have!

DH has some good moments, and realises that a lot of the stress is on me right now. I really struggled through PND, refusing medication, and regardless of how down and stressed I sometimes feel, it makes me feel as though I cannot speak to a GP about it, as DH is already on meds for depression and I absolutely must cope, no matter what, as what else can I do? I've been ill quite a bit recently, which I suspect is because I'm so run down all the time.
I'm obviously not near the breaking point, as I can recognise what's going on, and am taking what little steps I can to alleviate some stress. But dear Lord, just ONCE I would like DS2 to simply say "okay" and let it go when I say no. It hasn't happened yet this morning.......... 