Girlfriend had to give her jeans to her sister

So my girlfriend and her sister do their laundry at their mothers house and while folding clothes they came across a pair of my girlfriends very expensive, "guess" brand jeans. My girlfriend's sister's eyes got wide and she asked,
"Those are nice jeans. Do you even wear those anymore?"
My girlfriend kinda shrugged and said,
"Not really. They probably don't even fit anymore."
Her sister smirked and said,
"Well if you're not wearing them I bet I could fit into them. Let me try them on!"
Commence sister struggling into size 8 jeans and when she finally got them buttoned,
"If you're not going to wear these I'll just keep them. You probably can't even button them."
Then, shots fired, my girlfriend said,
"Are you sure you can wear those out? They give you a muffin top!"
Sis blushed then said,
" Once I loose the weight I'll be rocking these."