WORCESTER, Mass. (AP) _ An heiress who donated $6.6 million over two years to a fundamentalist sect called The Bible Speaks is taking the church to court in hopes of getting back the money she says she was coerced into giving.

''What else can you do after you've been raped?'' said 34-year-old Elizabeth Dovydenas.

But a lawyer for the church said the woman, whose father, Wallace Dayton, was a founder of the nation's fifth largest retail store empire, regretted her gift only after she was ''brainwashed'' by her husband and father into renouncing The Bible Speaks.

''The evidence indicates that everything she gave was a spiritual response, a prompting of the heart, uncoerced,'' said lawyer Roy Grutman. ''The church filled an immense void in her life.''

Mrs. Dovydenas' complaint accuses the church of coercion and fraud, claiming that donations went to illegitimate activities and to the pastor's personal use. The trial starts March 30 in federal bankruptcy court in Worcester, where the church has filed for protection from creditors.

Grutman maintains the heiress could wipe the church out if she succeeds in her request for the return of her money, plus interest and attorney fees.

He has tried in vain to block such evidence as pamphlets on The Bible Speaks doctrine, saying that seizing them would violate the church's constitutional right to free exercise of religion.

''This touches upon the First Amendment: To what extent can an Indian- giving donor invade the privacy of the church and its members?'' he asked.

Vern Countryman, a Harvard Law School professor who specializes in bankruptcy law, said the case was the first of its kind that he knows of that will be fought in bankruptcy court.

Both sides agree the most important question facing the court is whether Mrs. Dovydenas gave away millions of dollars of her own free will or made the gifts under pressure from Carl H. Stevens, the pastor and founder of the church.

The Bible Speaks claims 16,000 members in 17 states and 31 countries, with about 1,300 members around Lenox, the affluent Berkshire Hills town where the church has had its headquarters for 10 years.

Church spokesmen referred requests for interviews with Stevens to his lawyer, Grutman, who turned them down.

Stevens has told followers he was baptized by Christ in the early 1960s in ''liquid waves of love'' and was promised by God his every message would be anointed, according to the Christian Research Institute Inc., a non-profit cult watchdog group.

In a 1983 report, the institute said the pastor told his congregation he expected church members to follow him ''without question, without pretense, without hesitation, without giving him a hard time, without putting him off again in procrastination and disobedience and subtle rebellion.''

''I think he is fearfully sincere,'' said Ed Mosher, a one-time church missionary who left The Bible Speaks a few years ago. ''He really believes he is one of God's choice servants.''

Stevens was born in the rural Maine town of West Sumner and became a minister in a Baptist church in Wiscasset in the early 1960s, Mosher said. There, Stevens began the radio program ''The Bible Speaks.'' He split with the Baptists in 1972 following a disagreement with church elders, according to Mosher.

Mrs. Dovydenas began attending The Bible Speaks services with her husband, free-lance photographer Jonas Dovydenas, 47, in 1982. He soon stopped, but she became a frequent visitor.

She testified at a pretrial hearing that by 1985, while her husband was on assignment in Afghanistan, she was at the church nearly every day, listening to Stevens' lectures or confiding in parishioner Kathy Hill.

She testified that Ms. Hill told her to make gifts to the church, to cut her children out of her will and to pay her husband to stay out of her affairs.

But during that testimony, Ms. Hill was seen to mouth the words, ''You are lying,'' and on the stand she said, ''Betsy Dovydenas has perjured herself and lied.''

The heiress also testified that Stevens predicted her husband would die a violent death because of his distrust of the church.

Her complaint alleges that the pastor claims to have earned a divinity degree when he purportedly bought one from a ''diploma mill'' in Tennessee.

She also said Stevens persuaded her to switch to The Bible Speaks' financial adviser, lawyer and accountant.

She gave the church stock worth $1 million in late 1984, and, the following year, $5 million worth of stock, along with checks and cash amounting to $597,000.

Some of the money went to pay for a freighter making missionary voyages to the Caribbean, according to court papers.

But Mrs. Dovydenas' complaint accuses Stevens of investing money she gave him in a Florida condominium for his own use and to pay off former church members who threatened to sue to get back gifts they had made. The complaint gives no details of the latter allegation, and lawyers for both sides declined to comment.

''I was very accustomed to doing what I was told,'' Mrs. Dovydenas said in a hearing last fall. ''I didn't have a mind to object with.''

Grutman contended she was the victim of ''brainwashers'' hired to deprogram her and of a husband who wanted control of her fortune. He said their techniques included showing her films of the Jonestown mass suicides.

Her lawyer, Gordon T. Walker, described those Mrs. Dovydenas consulted when she left the church in January 1985 as ''exit counselors.''

In response to Grutman's charges, Jonas Dovydenas said in a recent interview, ''If I'm after control of Betsy's money, I've been an absymal failure at it for the past nine years.'' That is how long they've been married.

Grutman called the heiress a black sheep who was alienated from her family because she attended public rather than private school and married a Lithuanian immigrant disapproved of by her father, one of five brothers who built Dayton Hudson Corp.

''She immersed or sublimated her problems in her actions with the church,'' the church lawyer contended in an interview.

''That's such baloney,'' Mrs. Dovydenas responded. ''Life was terrific when I joined Bible Speaks. All I wanted was a church to go to. You don't need an immense void in your life for that. Bible Speaks fooled me.''