Paula went out on a date with Brian after work, she sent a text to let me know she was sleeping over at his place. She sent me snaps from the restaurant and movie theater, they were kissing at the theatre and he had his hand under her boobs. She came back to the house around 10AM the next morning, she teased me about going out with Brian when I asked if she had a good time. I told her I liked the photos, I asked if anything happened, all she would say was, "Wouldn't you like to know!" 

I followed her to the shower, she had a bra and white panties on under her clothes. I tried to look at her panties, but she shooed me away and told me I was being a pervert. She started the laundry that day before I got a chance to check them. She was in a good mood when she got home (Paula loves sex with Brian), so my best guess is that they went back to his place after the movie and had sex, then she slept over so they could cuddle.