Simpson, 31, was due to wed former NFL player Johnson, 57, in November this year.
“Everything is up in the air. She can’t figure out what kind of day she wants. Some days she wants a big wedding in Hawaii, then other days she wants something closer to home,” femalefirst.co.uk quoted a source as saying.
“She was so gung ho about planning their wedding, and now she’s gone dark. She won’t commit to a date,” the source added.