Vam-Drunk Wife got fucked by Robber

why did they have sex right away? where's the prologue? i need a dialogue at the beginning to understand why they had sex... it seems like the storyline is cut a lot, i don't like this, i'm horny because of the MILF's perfect body... for the storyline i don't understand because it goes straight to the sex scene, this is ntr? if she had sex with another man behind her partner's back it would be better if the storyline was longer and there was a prologue so the audience understands why the MILF betrayed her partner... moreover there is no English subtitle so the storyline is even more confusing!!