Well, then, that's a weak plot. And it isn't even original. Cybil Shephard and Robert Downey, Jr. did that years ago ... except that he was supposed to be college-aged.
To clarify my earlier remark: was this in the context of a woman going crazy, seeing her dead husband in the young boy, and were there consequences for this behavior? Apparently, this is not the case, and I couldn't find this acceptable in a film. (And even in context, an explicit, extremely passionate kiss would be over the line. An implied kiss might not be automatically.)
TS