Unplanned pregnancy question

[Kami]

I know there may be some people here that get very upset by the question I'm about to ask, but I figure this is the best place to ask it because everyone here is quite knowledgeable.

I'm currently staying with a friend who has 3 dogs of his own.  I have my 2 bullies.  Adrianne is in Heat and I've had to keep her separate from the other dogs.  Only 2 of the 5 dogs are not fixed.  Adrianne (my 1 1/2 year old bully) and Justice (a year old Staffordshire).  I let Adrianne outside to do her business, and the other dog was let out accidentally.  Long story short, the two dogs got stuck, so it's a pretty safe bet Adrianne will get pregnant. 

What are my options?  I have not gotten Adrianne fixed because I planned to breed her in the next year or so, but was waiting until I could find a good mentor.  I'm very concerned about the current situation and am in desperate need of some good advice. 

Thanks for your help.

Kami