It looks to me as though she made a conscious decision to attend all of the wedding-related events regardless of the price or the cost to herself, without making any attempt to control the expense. It's actually possible to wear clothing more than once, to attend some events but not others (the wedding, for example, as opposed to the "hen do" or the reception), and to send regrets and a gift to people you don't see as often or who are going to destination weddings.
An invitation to a destination wedding is generally: "we're acknowledging you but don't expect to attend".
It would be better for her if she owned this decision instead of presenting herself as someone who's being pressured into spending far more than she can afford. She clearly doesn't have the income to socialize as expensively as she's been socializing.
