Uncanny Behavior

When John grew up, he started questioning his mother about her sudden absence, every time she used to give one or the other excuse and he would become quiet. He knew his mother was a god-fearing lady and wouldn’t do anything that could hurt her husband or family. After certain years, he too stopped asking his mother because he was tired and couldn’t bear any more lies. He just wanted to make sure that his mother was safe. But where did she use to go?