When you get married it's normal to want your nearest and dearest around you, but this isn't always straight forward, as family situations can be complicated.
One man who has been invited to his dad's wedding is facing a difficult decision as he's already committed to going to his sister's 21st birthday party.
The their dad constantly excludes his younger sister, and now the brother wants to support her by not going to the wedding – but the dad isn't happy.
Explaining the situation on Reddit, the 27-year-old explained that his sister, who he gives the name Mary, has "always been overlooked by my dad from the moment she was born".
The anonymous forum user continued in the post: "My dad never wanted a daughter, and tensions with his ex wife (Mary's mom) lead to him basically excluding her from everything. Nothing she ever does is good enough for him and she is often excluded from family gatherings."
The brother does what he can to make her feel included, and he is "very close" with her, but he can tell she's "jealous of all the attention" the dad gives him.
Mary is celebrating her 21st birthday next month, and although he lives in the different state in the US, the brother has promised to fly with her so he can take her out for her first drink.
However, there's a spanner in the works. Their 56-year-old dad is getting married, for the third time, on June 8, and he only let him know the details a few days ago.
The man explained: "Now, my problem isn't the short notice, my problem is that June 8 just so happens to be Mary's birthday. Like not even a day before or later, no he plans to get married on his daughters birthday.
"I brought that up and my dad brushed it off saying it's just a date and it wasn't like my sister was going to celebrate her birthday with us anyways.
"I told my dad I already had plans to fly down and celebrate Mary's birthday with her and I wouldn't be able to make both events.
"He seemed shocked by this and asked why I didn't just cancel for his wedding since I'm already paying to come down. I could even bring Mary along and celebrate her there if it meant that much to me."
The brother said he was "p***ed off" because he didn't acknowledge his daughter's birthday, and after having an argument the dad hasn't spoken to him since.
He added: "Janice [the dad's fiancée] told me that my dad has been crying and miserable over what I said and that my selfishness has ruined their wedding.
"My dad and family are still mad at me and saying that I'm being petty and ruining his big day so AITA [am I the a**hole]?"
Since posting, the man has received lots of support online, with one person saying: "What goes around comes around and her 21st is a huge milestone - it says way more about your dad that his wedding was scheduled to conflict with it."
Another remarked: "June 8 is such a deliberate move. I checked the calendar, ITS ON A THURSDAY. Aren't weddings usually on a weekend so that they make sure people can make it and don't have to take time off work if they're coming from out of town?"
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