Describe the relationship that the people in the photograph have.
The elderly woman receives /is welcoming a guest at home. ( Using the adj. "old" is not wrong but seems a tad impolite, hence I have used the adjective"elderly")
The couple is engaged.
The man and the woman are in love and seem very happy in each other's company.
That's great! well done!
Oh ok, I understand, thank you very much !!!