KAGH-028 My girlfriend's best friend invited me to do something sexy... Can I resist the temptation? (I couldn't resist and ended up cumming inside her)

My beloved girlfriend. Her friend is incredibly beautiful. This incredibly beautiful friend invites me over. And it happens while she's sleeping and I'm resting my head on her lap! I know it'll be bad if she finds out, but honestly, my lower body gets hard. Unable to move with her head on my lap, my friend gives me a blow job, and with a mixture of excitement and a sense of guilt, I brazenly have raw sex and cum inside her.