The Scarlet Godwins - Nine

In this pivotal episode, Marley's letter covers the period
immediately after she first meets her sister, when she spots the
tall person lurking in the street, she comes to regard as 'the
beanstalk with the broken arm'. She doesn't mention how she and
Charlotte would soon be springing a surprise. Otto finds
himself wandering along a beach. He too, is preoccupied with the
twins' meeting, but his reflections are concentrated on a day
soon after they got together, and the bombshell they had in store
for Charlotte's family.