Miss-diagnosis.

'Why not a-bed?'
The doctor said,
'You pulse is all a quiver!'

'Your temperature
is very high;
I think it is your liver!'

"Oh no, good sir,
it isn’t that;
my liver is just fine."

"I just need sleep,
a place to lie,
to spend some hours supine!"

"My marriage bed
is out of bounds;
it’s otherwise employed."

"My bastard of a
husband has the
maid in there, conjoined!"

...............

 Dear Tess,
I hope you learn something from this poor woman's dilemma and at Willow Manor, always have available at least one spare bed!