Fiance's sister, my bridesmaid wants to get married before us

You feel how you feel, there's no right or wrong.

It does seem a bit like she's "one upping" you though, I'm guessing talking to her about it is not an option?

You could tell her about you not being able to go because of work and say having two weddings so close can be difficult for the family as they are expensive for guests as well. I'm guessing you booked first, unfortunately she can do what she wants at the end of the day, but I might just politely suggest she go a bit later in the year instead.

The whole situation is just very confusing because she's a very spontaneous person who's lived a pretty wild life and supposedly she's suddenly ready to settle down and commit to a marriage? They got engaged very quickly and she said they'd wait about 2 years before getting married. I messaged her two days ago to explain how I and her brother (my fiance) felt about it all and the fact that we were worried, she hasn't replied.

I am annoyed that she's trying to book her date before ours when our date has been booked for 6 months, but more importantly I'm worried that she's rushing into getting married at such a young age to a man who is 10 years older than her. She's a very smart and capable person but also quite spoilt and materialistic, hence the 5 k wedding dress that she's asked her fiance to pay for. They're clearly in the honeymoon phase and he seems to be happy to cater to all of her whims, but how long is that going to last for?

I suppose what I'm trying to say is that I feel that our wedding is more important because we truly and genuinely love each other and our relationship has stood the test of time, so we are getting married for the right reasons. We really don't know what she is thinking and her brother and I don't really take this engagement seriously.

Definitely a puzzler, something does seem a little off...

You have two options usually, voice your concerns or let them get on with it.

Maybe take the approach and say to her that "if it's meant to be, why are you rushing?"

She's an adult and can do as she pleases, but if you feel the need to look out for her do it, you most likely won't get any thanks for it though.

And as my mum says: the more expensive the wedding the less time the marriage lasts!

Aw, the plot thickens. This could lead to a major family fall out...

So as I previously explained H2B's sister suddenly told us that she's planning to get married in June, she'd previously said that they'd wait a few years because they got engaged very quickly. The want to get married abroad and have chosen a time that doesn't suit me because I'm unable to get time of work, and my H2B is adamant that he will not attend without me, especially travelling abroad by himself. He and his sister are very close and he's practically like a father figure to her because they have a big age gap, so I always imagined he'd give her away.

The reason, as it now appears, of this quick turnaround is that she's not sure where she's going be based with her work after June, meaning she could be working anywhere in the UK. Her other half's work is based in London. He's told her that he'll move with her but his work is very much tied to London so not sure how this would work. We think they're rushing into it and have tried to tell her that. She's a very spontaneous person and she's still quite young, so we're worried that it will all end badly.