I did some reading and I'm now more aware of the branching concept of the page.
If an unaware mother and daughter is next, they could be kept in ignorance if some of their mutual friends told them they had a surprise for them. Their (pervert) friends talks them into being blindfolded, put on a nose pinch and music in their ears from an ipod. Before that happens, they are given instructions about what to do when they arrives and just let them lead them. Only when they have gotten them in the right position and the fusing has started do they remove the blindfolds and ipads. I don't know the reason why their friends are doing this, but maybe both the mother and daughter are transformation fans without knowing about their common interests. As for their forms, perhaps your own artwork could be of inspiration, such as the sexual crab or Nemara and Juno.