The Colorado couple accused of lying to the authorities by saying that their 6-year-old son was aboard a runaway helium balloon last month have agreed to plead guilty, one of their lawyers said Thursday. The husband, Richard Heene, will plead guilty to a charge of attempting to influence a public servant, a felony, the lawyer, David Lane, said in a statement. Heene's wife, Mayumi, will plead guilty to making a false report to the authorities, a misdemeanor, the lawyer said. The couple was expected to enter their pleas on Friday morning at the Larimer County Justice Center. As part of their agreement with prosecutors, Lane said, the couple has agreed to probation, with the possibility that Richard Heene would also serve 90 days in jail. Lane said the prospect of Mayumi Heene's being convicted at trial and deported to Japan, where she is a citizen, was a determining factor in the couple's decision to seek the plea deal. Lane said that going to trial 'would have put the family at grave risk of seeing a loving, caring, compassionate wife and mother ripped from the family and deported.' 'This was not an acceptable risk, thus the pleas,' he added. The Larimer County district attorney, Larry R. Abrahamson, in a statement on Thursday, confirmed the two charges against the Heenes, but made no mention of a plea deal. The charge against Richard Heene carries up to six years in prison upon conviction, and Mayumi Heene's charge carries up to six months in jail, according to the district attorney. 