NEW YORK, Oct. 15 -- A woman who testified against Alon Alexander told jurors she "tried to get out of the bed a few times, but Alon kept pushing me back down." A jury later convicted him and his two brothers, and on Wednesday the government asked a judge to make sure none of them goes free.

Prosecutors in the Southern District of New York want life sentences for Alon, his twin Oren and their brother Tal, the former luxury real estate brokers convicted of sexually abusing women. Their sentencing memorandum, filed Wednesday, says the brothers "have been convicted of sex crimes of extraordinary magnitude." Sentencing is set for Oct. 27.

The defense is asking for 15 years each, which its lawyers describe as the minimum under some of the co...