My mother's Amaryllis plant has grown a little bulb, what should she do?
Answers:
Remove the new bulb carefully and put it in it's OWN pot with some good potting soil.
Put some new soil in the pot with the older, large bulb. Do not put it in a LARGE pot---Repot to a larger pot ONLY if there is no room for soil.
Keep in mind that Amaryllis bulbs need to be in a relatively small-sized pot (compared to the bulb) to get them to bloom at all when mature.
Other answers:
What is a bulb?
What is a bulb?
We have our amaryllis bulbs outside in a flower bed. They bloom every year and are not treated any differently than our other plants.
I'd just leave it alone for this year. Let it mature and then consider moving it.