I've never heard of that, I mean I was bullied my whole life, but it was because kids are cruel and I was chubby. Never had anything to do with my mom being a single parent. If kids bully then it's because their parents are doing a bad job, not you. Your daughter wil be fine.
I was bullied too! Cus I wasn't the prettiest crayon in the box lol. Afterwards things changed. & I agree, I just hope none of our kids will have to go through that cycle