A mum has been left fuming after her daughter was "forced" to do spelling and math tests at a sleepover.

She explained that her 7-year-old daughter had gone to stay at her friend's house for two night, but wanted to come back early as she was "really upset" over the activities. In a post on Mumsnet, she recalled:

"When I spoke to her this evening she sounded unhappy and said that she wanted to come home. "So I went and got her. Best friend's mum was being a bit odd when I got there, listing all the fun things they had done and saying that [dear daughter] was very tired. "When I got [dear daughter] back into the car she told me that the mum had made them do spelling tests and maths questions and told her that she was stupid when she made mistakes."

She said that the tests had been in her daughter's second language, which they use half of the time at school - and the encounter had left her daughter feeling like she was stupid. The post continued:

"[Am I Being Unreasonable] to think that this is an appalling way to treat a visiting child? "I've had to fob the mum off before when she has asked about [dear daughter's school reports, but this is much, much worse. [Daughter] is really upset and thinks she is stupid and I'm not sure whether to say something? "I've been slightly wary of this mum for a while as she seems to enter into the kids' friendships in a rather overbearing way, and I could imagine her deliberately trying to make things difficult for [dear daughter] if she took against her. But ffs."

The post sparked outrage over the other mum's "unbelievable behaviour" and her "strange and unkind" actions. One person advised:

"I'd be honest with your [dear daughter] and tell her that the mum is strange and unkind and that she's not suitable to look after her but her friend can still visit you if that's what she wants. "I would tolerate small talk with the mum if your children are good friends but under no circumstances would she be left in her care again."

Another wrote:

"That sounds weird and horrible of the hosting mum. Yes, I’d want to get to the bottom of that and tear strips off her if that’s what really went on. Your poor [dear daughter]."

Someone else added:

"That's crazy behaviour. Mother sounds horrific. Distance yourself from her and have play dates for your dd's friend around at yours instead. Hope [dear daughter] is ok."