In Mary's personal letters....

[Gene C]

"At Mount Vernon, a guest who slept in an adjacent chamber is reported to have heard a curtain lecture from Mrs. Washington to her lord. The General received it in silence, and at last said, 'Good-night, Mrs. Washington,' and was heard to turn over in bed.
"Mr. Buchanan, when I related the above, remarked that it bore with it internal evidence of its truth."

Just remember, George and Martha never had any children together