"The laundry room is on the other side of the house from our bedroom and has a door that locks." Not that they need to lock the door, but Jyn doesn't want to have sex with Rey in the room and the couch is too close, she's afraid Cassian would press pause if Rey so much as sniffled.

How does sex and parenting work???

She kisses his jaw again, tiptoeing forward until she's pressed up against him. After a second she breathes a laugh against his skin. "It's not like it's going to last very long." It's not like she is going to last very long.