Does intercourse in the anus or partial penetration constitute retraction (*Fay'*) of the *Ila'* vow?

Primary text

If the husband engages in intercourse in the anus or only partially penetrates without the glans entering the vagina, it does not constitute retraction (*Fay'*). This is because the oath was sworn regarding abstention from what he was obligated to refrain from, and the harm is not removed by such an act.