My sister catches us Fucking stealthily while studying next to us vr porn videos

My boyfriend and I are watching 50 shades of gray while my step sister is studying next to us, this movie always turns me on and now I have a cock next to me. I hinted at my boyfriend to fuck right there very quietly and in the end she can't resist and accepts. But my step sister catches us and makes us go from there to fuck somewhere else. But she has already gotten horny, what will happen?