Will Seaton knew that marrying his girlfriend Ashley Schaus also meant committing to spending his life with her younger sister Hannah, who will most likely always be dependent on her.
So when it came time to propose to the love of his life, he also had a question to ask her 15-year-old sister.
The 25-year-old Indiana man surprised Ashley by getting down on one knee and asking her to marry him. He then turned to Hannah, this time asking her to be his "best friend forever", WXIN reports.
Hannah reacted with laughter and then began crying happy tears.
Photographers Bret & Brandie Photography were there to capture the heartwarming moment, telling Mamamia they were "simply so excited for this sweet couple".