I thought a single shot of the woman on the right would be more interesting, but you're right, the picture works best with both included. a really good picture.
Unfortunately I didn't get to take any more pictures of them although I wish I had. I was using a 28mm lens and was real close as it was about 4 feet away. I was shooting as I moved closer, but they were turning away. I tried reassuring them as I moved closer. Out of about 5 shots this was the only one they were both not turning away and was the closest. I considered myself lucky to get this one and felt with a 28 I'd make the woman on the right uncomfortable to get close enough for a portrait. I feel at ease street shooting but I never want people to feel uncomfortable if I don't have to.