Indeed it is. Especially her clean ones so she wears them with your cum in them. I also use anyone I get the opportunity to use and return, relatives, friends, neighbors.
I would jerk off in her clean panties daily, and sometime a bra. I would carefully dry them then manipulate the material so it wouldn't be all stiff then put them back so she would wear them. It was extremely exciting to know my cum was rubbing against he sweet juicy pussy and ass all day and mixing with her cunt juices when she gets sexually aroused. Now I use my wife and daughter's panties. I'm positive my wife is fucking a coworker from her office and I like to think of him kissing her pussy before taking my cum filled off her and giving her a good thorough fucking.
It's very possible. I grew up jerking off in my sister's panties. She had meticulous hygiene and kept her panties and bra in a perfume scented drawer. She also had a magnificent hairy pussy. My very first orgasm was while wearing her clean panties and humping her pillow in her bed when I was home alone.