"All possible means were used by the infatuated parents to conclude the bargain; and deception put an end to these usual artifices"

This quote by Adelbert von Chamisso is referring to the lengths that moms and dads will go to in order to protect a great marital relationship for their kids. The expression "infatuated moms and dads" indicates that the moms and dads are so desperate to make a good match that they want to go to any lengths to make it happen. The expression "conclude the deal" recommends that the parents are attempting to negotiate with the other household, and the expression "deception put an end to these normal artifices" indicates that the parents resorted to deception in order to make the deal happen. This quote is a commentary on the lengths that parents will go to in order to protect an excellent marital relationship for their kids, and the lengths that they will go to in order to ensure that the offer achieves success. It is a suggestion that moms and dads will do whatever it requires to make certain that their children enjoy and safe and secure, even if it means resorting to deceptiveness.