The short version of my advice is: get it fixed. Now, here's my tale of adding a second income to a family's budget and what happens to the money:
Doubling household income may not yield as much as you think. Some of these (but maybe not all) new expenses may be introduced to your budget:
1. Extra commuting expenses (which you are getting ready to face now)
2. Daycare
3. Saving for retirement (you are probably gonna have to play catchup)
4. School loans
5. paying down short term / high interest debts
6. cost of conveniences related to being away from home more
7. Increased income taxes (you are gonna get hammered on these, but it is a relatively good problem to have)
8. random insurance coverage, e.g. short term disability, etc.
Believe me, I added an electrical engineer's entry level salary to my household income in late 2008 and we have managed to pay down:
~$5K in CC debt (that was all)
~$6.5K in school loan debt (4.5K remain)
~$11K auto loan (done)
And we also have saved:
$10K min in checking at all times (was less than $200 when I received my first paycheck, wife was on maternity leave - our only child so far)
~$12K contribution to 401(k) + more for company contributions
And the rest just seems to have disappeared: daycare adds ~350/month, commuting expenses ~220/month (loooong commute for me), utilities have gone up a lot, etc. Added ~$30/month for better satellite tv service. Baby expenses, too.
It really doesn't look like we have done well at all considering I've been "paid" ~75K since 2008. I can estimate about 45K in real increase in assets (contributions only, this doesn't count performance) and decrease in debt.
All this in mind, if you have been doing back of the envelope calculations about your financial outlook, you may want to act as if the added income is reduced by half and proceed from there.
p.s. we have not taken any expensive trips (staycation for us), I did chip in $600 to get MiL an iMac for helping with daycare, but no new computer for us. We go out to eat 1x per week, expense is typically $25 each time.