I was practicing yoga when my roommate arrived and he got horny when he saw me

I was practicing yoga as I usually do in the afternoons when my roommate is not on the floor, and I take the opportunity to practice comfortably and with little clothes, and well, I was doing my routine when my roommate arrived and when he saw me, he came quietly to where I was and he got very horny and at first he said he would help me... but then he ended up fucking me