My wife is... how do you say?

Ah yes,

pregnant (comparative more pregnant, superlative most pregnant)

1. (not used in the comparative or superlative) Carrying developing offspring within the body.
2. Having many possibilities or implications.

Synonyms

• (carrying developing offspring):
  • (standard): expecting, expecting a baby, gravid (of animals only), with child, fertilized
  • (colloquial/slang): eating for two, having a bun in the oven, in the family way, knocked up, up the duff
  • (euphemistic): in an interesting condition
• (having many possibilities or implications): meaningful, significant

[ pregnant - Wiktionary ]

Up the what? Apparently UK slang. I'm sure there is more ways than this to suggest that someone is preggers.

There are a number of colloquialisms for pregnancy, usually regional. The action of impregnating a woman or girl is called 'knocking (her) up' in Canada and some parts of the U.S., and the state of being pregnant 'knocked-up'. The term 'lady-in-waiting', meaning a pregnant woman, is used broadly in the U.S. The word 'gone' or 'along' is used to represent gestational time, e.g. 'she's really far gone' or 'about 6 weeks gone' or 'six months along'. In the southern U.S. the euphemism of a water well is occasionally used to represent pregnancy (e.g. 'drink out of the well', to become pregnant), and a baby almost ready to be delivered is 'on his/her road'. Eastern Seaboard slang describes the woman as being 'in a fix' or, occasionally, 'preggers'; the Southern U.S. equivalent is 'in the family way'. An alternate term not slang or colloquial is 'with child'. 'Having a bun in the oven' is another frequently used phrase to indicate that a woman is pregnant. In Australia, it is commonly held that a pregnant woman is "up the duff".

[ Wikipedia via Answers.com ]

That cleared that up, espeically that "drink out of the well" bit that makes no sense...