Man proposes to girlfriend, asks her sister with Down syndrome to be BFF

In perhaps one of the sweetest moments you'll see, a man in Indiana proposed to two sisters at the same time -- but for a touching reason.

When Will Seaton popped the question to his girlfriend, he made sure to ask her sister, who has Down syndrome, to be "Best Friends Forever."

Seaton's fiancee said she told him that she was always part of a package deal.

The couple are planning to marry in the fall.

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