My sister travels all over the world without a mahram.

Answer

Your sister is in gross error. Rasulullah (Sallallahu alayhi wasallam) said that a woman who believes in Allah and the Last Day should not travel without a mahram. Thus, your sister‟s evil act borders on kufr. Your attitude of not allowing your sister to visit if she travels without a mahram

is 100% correct.

THE YOUNG & THE OLD Rasulullah (Sallallahu alayhi wasallam) said:

"The best of your young people are those who emulate the old, and the worst of your old people are those who emulate the young."

MUSHTABAH

When Hadhrat Raabiah (rahmatullah alayha) was on her deathbed, Hadhrat Maalik Bin Dinaar (rahmatullah alayh) asked her: "Do you desire anything of the world?" Raabiah: "For thirty years I had desired to eat fresh dates, but this desire remained unfulfilled." Maalik Bin Dinaar thought: "She appears to be a guest for a few more moments. How could I procure fresh dates so quickly?" As he was reflecting, suddenly there appeared a bird with a fresh date in its mouth. The bird deposited the date near to Maalik Bin Dinaar. He hastened with the date to Raabiah. She said: "From whence did this date come?" Maalik Bin Dinaar narrated the episode. Raabiah said: "It is improper to consume the date. I do not know from whose orchard the bird plucked the date. I shall now consume dates after I reach My Master (Allah Ta‟ala)."