Is it possible to detach and re-attach to a spawned process using separate expect processes?

Question

I have an expect script that spawns a process, then does some initialization (authentication), then performs some task that needs prior authentication.

Considering to extend the script to execute multiple tasks after initialization, I wondered whether I could use separate expect processes to perform each task (once the spawned process terminates it needs to re-authenticate).

So that would mean:

1. First expect spawns a process and does initialization. Then expect exists, but leaves the spawned process active.

2. For each task to perform: Start another expect process that re-attaches to the process spawned earlier. This step would repeat as often as needed.

3. A final expect re-attaches to the spawned process and does a clean shutdown of that process.

Is that possible? The advantage would be that for many tasks, a script could be created on the fly, being executed, and then replaced by the next task's script. Otherwise I would have a very lengthy script...