PMS Also Happens To Spiders

I promised I would post a better picture of Roosje when I had a chance. Well she is staying at our home for the summer vacation so I was able to make a picture today. She is usually very sweet and not at all aggressive but when I opened her tank today she sprang into a threat posture and I was able to shoot some beautiful pictures of her being defensive. She made sure their even were some drops of venom hanging from her fangs and I will not go near her when she is standing like that. I guess even spider can have PMS