I have seen many plants where the offsets as well as the main stem all go to flower. There is a hormone called florigen that induces the response but there's also induction of other hormones and these are translocatable from the mother rosette to the offsets. Sometimes if you get offsets after decapitation and detach them from the parent plant, the offset will not flower. Many times though things continue to flower.
In Semps the vegetative meristem converts to a floral meristem and that is the process that you need to interrupt.
Kevin
