My 2¢ says to treat her no differently.
And do not second guess yourself for it
later. Knowing where they fit in is part
of a child's environment. Changes are
intrinsically upsetting.
I'm a high-class apple picker (= engineer),
but when we bought a first house we bought
an old farm. We had observed that farm kids
always had a sense of responsibility that
stayed through their adult years. So we
felt that an old farm would be a good place
to raise our two toddlers. A few years later
we bought a milker calf to raise as a family
cow. When she freshened (= started to give
milk), we settled into a pattern: I did the
morning milking (by hand, not machine), and
the oldest kid still at home did the evening.
The kids knew that they had to ask in
advance for coverage if they had a ball game
or date, etc. One night Peter came to me
with a problem --- he was a bit sick AND he
wanted to go to a basketball game. It was
not in advance; I said, "No." He was not a
happy puppy.
Well, maybe a cold is not comparable to TM,
but the principle is the same.
Alton, who is, 36 years later, still in the
house where he raised three kids, each with
a beautiful sense of responsibility