I consider this strip as a reminder about why we'll never see any of the characters in QC start a family in the conventional biological way. It's because Jeph dislikes babies to the point where it's close to a phobic aversion and, because of that, he cannot draw or write them at all.
That isn't a criticism; we all have weird quirks after all. However, it is something that people need to bear in mind when addressing their own expectations for the future of the strip.
This aside, I think that Sam and Emmett are very, very cute together. They are very obviously deeply into a puppy-crush. Sam, at least, doesn't know it.