The new issue of Us Weekly (on stands now) reports that Jon Gosselin is telling friends his estranged wife Kate — whom he calls "monster mom" — is abusing their kids.
"Jon says she spanks the kids all the time," a source tells Us Weekly. "All she has to do is look at them and they get scared."
Case in point?
Kate, 34, "kicked a lego building into a million pieces because the boys didn't put it away the first time she asked them to," the insider says.
A Kate confidant tells Us that Kate "barely talks" to her children.
"The nannies are doing 95 percent of the work," the pal says. "Kate has a short attention span, and everything upsets her."
Jon, 32, isn't that much better, according to another source who overheard him ask a paparazzo what time the children get home from school.
"He gets annoyed when they interrupt him when he's on the phone," the source says.
For more details inside Jon and Kate's battle — including what he instructs photographers to yell at his ex to really get under her skin, how Kate throws temper tantrums and cries in her car, and how Jon plans to throw a "F–k you, Kate" party after their divorce is finalized — pick up the new issue of Us Weekly, on stands now.