Out and In Once Again

Out right now
But wishing
I were in
Sitting here
Lusting
Which they say
Is a sin
But my lust
Is for you
But you lay asleep
So I am out
But wishing
I were in
And in
Very deep
But tomorrow
Will come
And I'll be in
Once again
Surely such desires
And nighttime
Contemplations
Can't be a sin
Or can they?