YOU SAID:

sexing my sister in her bed that is my bed and hers now.

INTO JAPANESE

私のベッドと彼女のベッドである彼女のベッドで私の妹をセックスしています。

BACK INTO ENGLISH

I have sex with my sister in her bed and her bed is her bed.

INTO JAPANESE

私は彼女のベッドで私の妹とセックスをしています、そして彼女のベッドは彼女のベッドです。

BACK INTO ENGLISH

I have sex with my sister in her bed, and her bed is her bed.

INTO JAPANESE

私は彼女のベッドで私の妹とセックスをしています、そして彼女のベッドは彼女のベッドです。

BACK INTO ENGLISH

I have sex with my sister in her bed, and her bed is her bed.