They're taking a walk and a Sunday drive.
They've either been having dinner or leaving because they are counting on a get-together later.
I think they're husband and wife.
I think they're young friends.
They look like they are known to have a friendship that might lead to marriage.
Certainly the larger one is going to propose.
I think that's a possibility because there doesn't seem to be any onslaught of snow or other natural disturbances.
It looks like a very close relationship.
It looks like they are good -- friends is the wrong word -- certainly seem to care about each other.
It looks like they're on a honeymoon because they're holding hands in the middle of the street.