Position yourselves so that the woman is sitting in an armchair with her arms and legs wrapped around the man, who is kneeling in front of her.
Place the tip of the man's erect penis at the opening to the woman's vagina and insert slowly. Her opening should be wet enough to allow for easy penetration.
Push in slowly at first to ensure that everything is comfortable and painless for both of you.
Move in and out at a pace that is comfortable for you both until one or both of you feels like stopping or switching to another position.