I have peace offerings with me; this day have I payed my vows.
– Proverbs 7:14
The peace offering (Leviticus 7:11-18) involved a meal eaten from the leftover meat from the sacrifice. It was to be eaten that day by the offerer. Many commentators assume she wanted to put on an air of piety, but there is more to her appeal. I doubt she was trying to salve her own conscience for the whole description of her speaks of a severely hardened conscience. More likely, she is reframing the prospect of a night with her in terms of religious or holy things. This distracts from the awful sinfulness of what she wants and gives a veneer of legitimacy and wholesomeness.