history: I'm supposed to visit my sister's family for thanksgiving this year, but I'm not really looking forward to it. We haven't gotten along over the past several years. 
current: I'm supposed to visit my sister's family for thanksgiving this year, but I'm not really looking forward to it. We haven't gotten along over the past several years.
next: Sibling rivalries are unfortunate. Hopefully you two can patch things up one day?