Rummaging though her closet in search of her favorite Magic Tummy girdle, Ms. Dee-Dee suffers a fatal heart attack. There are no white lights or angels, but instead she is sucked into a Black Hole, which spits her out on the other side. There she begins a rowdy adventure, living her life again, and seeing it differently this time around. Everyone is there: the husband with the third teat, the phantom lover killed by her husband, and her best friends: an ex-school teacher spiritualist, and a neighbor who pimps for the neighbor’s lusty 86-year-old father. Their lives are stuck to her like superglue, and she comes to realize she has never once been alone. In The Black Hole In Her Closet, Ms. Dee-Dee is given what so many yearn for: a second chance, and she quickly learns how her choices, for good or bad, have shaped her destiny.
Wasn't this a movie with Jimmy Stewert? Or was it Marlo Thomas?
You can recycle any old ideas that catch your fancy but you must bring something new and fresh to it and that does not include a husband with a third nipple.
You've got the format close to correct (you're missing any enticement to actually read the book since you tell us everything including the ending) but it can't disguise the fact that this novel is same old same old.