[Maritime Q-Scout]

I suppose you could always take the approach of going into graphic detail of your bedroom shenanigans and nasty loving making romps making it expressly clear that you're violating their daughter, perhaps in ways that are unbecoming in their belief system. Explain their daughter's appetite and desire to invite her female friends over on the weekend for beer, barbecue and to share a sausage.

Then ask for advice on how to get her to stop her Satanic rituals, her killing of goats is really starting to frighten you.