Totally off topic-JEANS!

Straight to point. I live in skinny jeans and I’ve recently ripped my last pair of black ones 😫 So went to primark today and thought I’d get a pair while I was there. Anyway I’ve always struggled fitting into jeans due to the fact I’ve got a size 8 waist and a size 12 arse and thighs 😩anyway I got a pair today and they fit my waist and arse fine but are a bit tight on the thighs. Was wondering if any of you have any tips on stretching them out??