"Star-Crossed" is Tim Sullivan's sequel to "Planetesimal Dawn" (FSF, 2008). Although I liked both stories, something is missing from them for me to quickly make the connection.
Wolverton and Nozaki need to escape from a dangerous situation. Their only option is to hope through more time bubbles or vortexes. They visit many alien civilizations, affect time and find true happiness along the way.
Like "Planetesimal Dawn" I had to re-read the story before I was sure what was going on. The story continues with the Doctor Who feeling. Of the two stories, I prefer the first one.