Answer:
Tomas may learn to tease his brother only when his parents are not around
Explanation:
In the scenario being described the most likely outcome is that Tomas may learn to tease his brother only when his parents are not around. Since Tomas gets in trouble and punished when he is caught by his parents teasing his brother, he will eventually begin to only tease his brother when his parents are not there to catch him doing so. That way he will still be able to mess with his brother but won't have to deal with the consequences of doing so.
