I always have volunteers coming up everywhere. Kinda neat, but if the seedling
is from seed
from a hybrid cherry tomato plant
, then the chance of the fruit resembling it's parent are very slim and most times they taste terrible. Also, trying to grow tomato plants
indoors, especially indeterminate types, which this seedling
will most likely be, is very difficult and probably not worth the trouble. They need a great deal of light and a windowsill will not provide that. Sorry to be the bearer of bad news Amy, but it can't hurt to go ahead and try just for the experience.