YOU SAID:
when my wife's boyfriend say i can stay up late
INTO JAPANESE
妻のボーイフレンドが遅くまで起きられると言ったとき
BACK INTO ENGLISH
When my wife's boyfriend says I can get up late
INTO JAPANESE
妻のボーイフレンドが私が遅く起きることができると言ったとき
BACK INTO ENGLISH
When my wife's boyfriend says I can get up late
You should move to Japan!