Hello Rachael and welcome to alt.support.cancer.
I think it's best that the prognosticating be left up to her doctors (and
time), since we don't know her age, any other health problems, if
applicable and what the response to chemotherapy will be.

http://tinyurl.com/2lgkq (American Cancer Society web page on colorectal
cancer) the cancer being found in her ovary states "distant mets" which is
anyone's guess as to where else (if applicable) it might also show up.

I would expect (if there's no other serious health conditions), she and
you will have to view her cancer as "chronic" for a while and see the
response to chemo and live with having to wait for scans from time to time
to monitor if there's progression (or other mets) after that. That's
probably one of the hardest things to live with ...wanting to hear the
word "curable" and having to deal with living with the uncertainty for a
while, sometimes years, in many types of cancers.

If you look on that webpage, under Surgery, it says "If your colorectal
cancer has spread (metastasized) to a few areas in your lungs, liver,
ovaries, or elsewhere in your abdomen, removing or destroying these
metastases may be curative. Sometimes, surgical treatment of metastases
can help you live longer. If only a small number of metastases are present
in the liver, lungs, or ovaries, they may be removed by surgery. If only a
few liver metastases are present, completely removing them along with the
colorectal tumor may even cure you. "  There's a lot of "mays" in there
AND perhaps other helpful information there on the right sidebar of the
page.

Her immediate hurdle is recovering from the surgery and adjusting to not
having a colon anymore. I would think, from reading here, that they would
have to wait a bit for the chemo, because it can cause lowered resistance
to infections or maybe interfere with healing.
If she's had a colostomy, she will need help in learning how to manage it.
Specially trained ostomy nurses or enterostomal therapists can do this.
So she may be busy for a while, but do lend a listening ear to her and a
shoulder to lean on.   There's also (IIRC) an ostomy newsgroup, if she has
questions about her colostomy. I expect her nurses or therapists will help
a lot. It also helped Dad a lot to keep a sense of humour about it.

Keep in touch and let us know how it's going.
J - not a doctor