Dirty diapers, sour clothes, greasy and roachcy clothes are washed in laundries.
You have a legitimate fear. Many cockroach infestations start because an unsuspecting person carries roaches from some place else into their homes via grocery bags, boxes, yes even in laundry. If I were you, I would go to a laundromat to wash and dry my clothes until you get your own appliances. Don't carry anything into her house that you will be bringing back to your house, even a purse.
I'm moving to my friends house, but in a separate house on her big property. She has a cockroach problem. I'll be using her wager/dryer into I get a set of my own. I know cockroaches don't like humans, so they won't be by our on us, but I'm having this fear of washing my clothes and bringing cockroaches back to my house.