Greetings. Am new to the forum, although DW is a regular on here, so thought I would take the plunge. 
The Rage. How do other hubbies cope? DW is 26 weeks pregnant and prone to episodes of being extremely bad tempered, which for the best part I am putting down to her feeling heavy and hormonal. I hope that doesn't sound too condescending, but DW isn't like this normally and by her own admission has said "it's the hormones" after everything has calmed down (although not always).
Anyway, am stuck in the middle of another bout of The Rage at the end of a long day, upon which after I was accused by DW of not standing up for her when she was arguing with someone (a long story, which isn't worth repeating on here). That was last night and DW is still not talking to me. I made her breakfast (as I do every morning) and she refused it, coming downstairs to make exactly the same thing herself.
For the record, this is not the first time DW has said she feels I haven't stood up for her. I would, always, just not for something that in my mind is utterly trivial - it won't make any difference, just lead to DW shouting and being stressed, and myself worrying what effect this might have on our unborn child.
These tempers happen maybe every 2-3 weeks or so. The pattern - as I see it - is that DW starts stewing and needs to take it out on someone, the end result being that it is normally me. I tend to deal with it by trying to talk it out, but when this doesn't work, staying out of DW's way until she has calmed down. Her teenage son (so my SS) lives with us and am worried that he will start to become affected by this, although he's a very easy-going kid and doesn't seem particularly bothered so far.
So, any tips on how to manage this kind of thing? I'm starting to feel a bit useless. 