Trauma (1976)

Suzanne laying in bed wearing only a t-shirt with her butt on full display. Linda enters the room after a while and they end up having sex. Linda kisses Suzanne and sucks on her puffy nipples during this long lesbian scene. Once they are done, Linda leaves and we see a terrified Suzanne locking herself up in the bathroom, but ends up being killed by Linda. We get some nice looks at Suzanne’s fully naked frame in the process.