The estranged wife of The Hurt Locker star Jeremy Renner has fired back at accusations she left the couple's young daughter alone for 15 minutes to attend a party and chose alcohol over breastfeeding.

Renner made the claims against Sonni Pacheco in new legal documents as the former couple battles over custody of little Ava.

The actor also accused his Canadian model ex of plotting to blackmail him by threatening to release intimate videos if he reneged on a deal to help settle her immigration issues.

Four months after the couple decided to split, Pacheco is demanding primary custody of their daughter and more than $13,000 -a-month in child support, while Renner is seeking joint custody amid claims his estranged wife is an unfit mom.

Taking aim at Renner over his legal claims, Pacheco insists Renner is lying when he states she left their one-year-old tot home alone and was caught smoking and drinking during her pregnancy.

The model also insists she didn't stop breastfeeding because she was drinking alcohol - she stopped because her diet was making Ava gassy.

In her legal response, obtained by TMZ.com, the model makes no mention of Renner's extortion claims or his accusations she wed him to gain a green card.