Jolyon,
1st trimester, 1st time pregnant,
her body is adjusting to hormone changes,
best to overcome the change for this moment is to rest.
If girl, not as bad,
if boy, be ready for a BIG BANG from your wife.
(Have she seen her doctor for Folic Acid, supplements & multi-vits yet?)
From looks to temper to food intake, likes & dislikes...
From a wife point of view, I'll say... GIVE IN... hehehe...
Nothing is more difficult than being pregnant & giving birth,
since hubby can't help with it,
then please make her feel good & important about it... hehehe...
CONGRATS!!!