Brooke is a force of nature on The Bold & the Beautiful, and every man has been at her mercy at some point in time. Judging from Brooke's history, I see one of the following scenarios happening:
Scenario #1 - If the baby that Nick and Taylor are carrying is Brooke's baby, Nick will have a decision to make. The Nick & Brooke storyline was magical, but twisted at first, considering Nick & Ridge are half-brothers. Brooke & Nick have been on again and off again a few times. Brooke's daughter, Hope, considers Nick to be her father. Now that there is the possibility of Brooke having a child with Nick, everything may change. When Nick & Brooke were together, they talked immensely about having a child. But that never came to fruition, and eventually, Brooke made her way back to Ridge.
Scenario #2 - If the baby that Taylor is carrying is the donor's baby, I feel that it's inevitable that Brooke and Ridge will end up together. I don't see Ridge and Ashley having a connection to rival the love saga of Brooke and Ridge. Now that Stephanie seems to be out of the picture (for now anyways) Brooke and Ridge would have a better chance at success.
Scenario #3 - If the baby that Taylor is carrying ends up to be the donor's child and Ridge decides he does not want Brooke back, Brooke may end up by herself. This would be one of the rare times in the history of The Bold & the Beautiful where Brooke is without a man in her life.
Brooke's actions are definitely dependent upon the maternity of the Taylor’s baby. Even if the baby is Brooke's own, I don't see Taylor just handing over a baby she has carried for nine months and grown attached to. Also because Nick is in love with Taylor, I don't see him immediately running back to Brooke if the results are in her favor. If Nick does go back to Brooke, Ridge may have a fight on his hands to win Brooke’s heart.
Bridget advised Nick not to do any maternity testing until the baby is born. The next three months (which in daytime could be a few weeks) of Taylor's pregnancy will be really interesting. Which scenario do you think will ultimately play out?