Isabela says that she's sorry for abandoning you and that she didn't even get the ship in the end. Here you have two choices, you can forgive Isabela or call her a backstabber.
If you forgive her, she can't believe there's no rant and asks if you're trying to bed her down. There's three choices here and usually one is a romantic option. Regardless of which dialogue option you choose next, you get Isabela: friendship (+10).
- pc 1.03: If no response choices result in a Friendship gain, reloading a prior save may fix the problem.