assalamu alaikum
first of all sathan will gave thoughts of sexual thing..... then he desire to do that thing . so plz crash they niyaath (thoughts)... bcz in hadees we can see.... muslims thoughts is better then amal/deed (perfomance).... so plz omit all things make plaenty of time in dua...
assalamu alaikum
tell him and you explain about kull sura in al-quran with tafseer okey!!! b4 u talk to her. pray 2 rekath salah and make dua ...... then do it allah help us ..
keep me in ur dua!!