A mum has said she was "really not happy" after finding out her sister had given her 10-month-old son a non-alcoholic cocktail.
The anonymous woman posted her story on Mumset and asked for the opinion of other parents.
Writing in the 'Am I Being Unreasonable' section of the site, the mum vented about her sister's actions, quickly racking up more than a hundred messages, the Liverpool Echo reports.
Explaining why she had been left "undermined" by her sister’s actions, the woman said: "I'm really not happy that my sister (21) has given my 10 month old DS [dear son] sips of her non-alcoholic mojito.
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"What's made me quite upset is that she said it's not the first time she's given him this! She makes it with syrup and a mojito can just for context on how sugary and sweet this is."
She went on: “I've explained countless times that I only give him water or breastmilk for fluids throughout the day. I have never offered him fruit juice, cordial/squash or any other drinks loaded with sweeteners.
"It's actually bothered me and makes me feel like my parenting is undermined when I have to justify my decision not to offer certain foods or drinks.
"Some weeks ago she said I was going to give him issues with food as he grows up as I didn't want him having ice cream, especially just before his dinner. Just feeling quite bothered by this."
Other Mumsnet users gave their opinion on what had happened - and many shared the same view, the Liverpool Echo reports.
"Of course you are not being unreasonable to be bothered. If this was me, I wouldn’t leave her with the baby when I wasn’t there again," one said in support.
Another commented: "Stop her being alone with him is the only way to solve this."
"Your sister needs to stop looking after him / being left alone for long enough so she can feed him unsupervised," a third echoed.
A fourth tried to reassure the mum, commenting: "Don't worry too much about him - he'll be fine. Do worry about him being with your sister alone in the future, because she doesn't sound too concerned about what she has done.
"You're the parent and she should respect your boundaries and not challenge them, unless unreasonable. Which they are not - completely normal to not want your child to have sugar he doesn't need at 10 months old."
Others, however, felt she may have been overreacting.
"I couldn’t get too upset about this, there are much worse things to feed a little one. Chili prawns for one!!" another mum replied.
While another said: "She shouldn't have gone against your wishes but its not the worst thing. He's unlikely to guzzle it."
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