Pregnant, so ejaculation is okay!? Hiding from her brother, she secretly hooked up with her sister-in-law! IENE-460

My close brother and beautiful sister-in-law. I have a good relationship with both of them, but recently, because of my sister-in-law's pregnancy, their relationship has undergone a subtle change. My sister-in-law's libido has increased since becoming pregnant, but my brother hasn't been able to have sex with her lately. Although I don't want to hear this, I'm being pressured by my sister-in-law... and my brother is right there!