In this day and age, there are many things that are considered red flags, but it can be hard to work out whether something is just a little inappropriate or very concerning.
One man has been left in this predicament after discovering that his mother-in-law still bathes and showers with his nine-year-old niece.
Known only as "Concerned Uncle" the man from the US admits he's unsure if this behaviour is ok, as he personally finds it "very strange".
He claims he has discussed it with his partner and they didn't see an issue with it, so he decided to consult a parenting expert and wrote into an agony aunt column.
In a letter to Parents.com's Ask Your Mom, the uncle asks Emily Edlynn, Ph.d., for her thoughts on the family situation and it brings up an important discussion around boundaries, nudity and body shaming.

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The man's message reads: "My mother-in-law still bathes and showers with my nine-year-old niece.
"I find this very strange. When I talk to my partner about it, they say 'they're close'.
"Is this weird and should I say anything to my in-laws?"
In response, Emily confesses her initial reaction was "yes, this is weird".
But when she "took a step back" she realised there's actually much more to the situation than meets the eye and that we are often "too quick to associate nudity with sexuality, and sexuality as taboo; therefore, nudity = taboo".
The expert went on to discuss the shame around nudity, sexual assault and issues of privacy, before concluding: "Looking outside of the lens of our culture, I more thoughtfully changed my response to, 'no, this is not strange.' Probably. The scenario also brings up interesting considerations around how we teach our children about bodies and boundaries.
"Nudity among strangers reigns in certain settings, like locker rooms, spas, and French beaches. As my children have become more private with age, I have explained that there will be situations in their future of undressing in front of others, and it doesn't have to be embarrassing or 'inappropriate.'
"As parents, we need to look for these opportunities to distinguish naked bodies from sex. In fact, as crop tops have become the style du jour, I intentionally made no issue of my daughters bearing their tummies all summer because I did not want to sexualize their young stomachs. Nudity and showing body parts does not have to equal sex, despite the American tilt in this direction."
She added: "Assuming that you do not have concerns about sexual abuse, I would recommend doing what I did: think more about your own reaction. Since this is happening between family members outside of your nuclear family, it does not seem to warrant your intervention.
"You make decisions for your family based on everyone's comfort level, and other families will make their own choices.
"As long as our children are safe and learning positive messages about bodies and boundaries, we can all work to embrace a wide range of 'normal'."
Do you agree with what the expert had to say? Let us know in the comments below.