In court documents filed in Orange County, Calif., Brown claimed financial and emotional problems prevented him from responding to Houston's divorce petition, People magazine reported Friday.
Brown is seeking shared custody of their 14-year-old daughter Bobbi Kristina, child support and spousal support. In the documents, Brown also said he doesn't believe Houston provided a copy of their prenuptial agreement -- which reportedly precluded spousal support -- to the court.
"After Whitney and I separated, I had nowhere to go and very little money to live on," Brown's petition said. "I was, for all intents and purposes, homeless."
Because of his state, he didn't understand the importance of responding to Houston's petition, Brown said.
When he learned Houston sought a default judgment to fast-track the divorce and win custody of their daughter, which she eventually did, Brown said he "could not believe it."
A court hearing is scheduled for June 15.