Efficiently.

"Mara, do you think Selas would mind, if you helped to charge me up?" you ask, giving her a sly look.

"Not if she doesn't find out. Come along," she smiles back, pleased that you picked up on her 'suggestion'. Turning quickly, she leads you through the labyrinthine corridors of your home, bringing you to one of the numerous rooms that you have yet to discern the purpose of. Closing the door behind you, she turns and waves her hands, muttering under her breath at it.

Her magics, once unfamiliar, are now somewhat clearer to you, and you recognize the spell to be one of deafening and blinding. It would seem like the nanny would like to keep this little tryst as secret from her employer as she can. Once the spell is in place, she turns back to you. "Well Sir, now that we're alone, what exactly are your intentions with me?"

Fortunately for her, you had thought of that on the way here. Walking forwards, you stand at her chest height, reach up and strategically undo some of her shirt buttons, and pull the halves aside to frame her bountiful and milk-laden bosom. Taking one in your hand, you close your lips around her nipple, and begin to lap and suckle at it while squeezing it to encourage flow, while your other hand kneads and gropes the other breast, getting it ready for you.

Closing her eyes, Nanny Mara lets out a satisfied sigh and caresses the back of your head with her hand, pulling you in closer. "Mm...," she groans, "I was hoping that you would do this. Ooh..."

Sampling her milk, it's thicker and creamier than before, but not as sour. Switching breasts, you make mention about that.

"Well, it's fresher this time," she moans, stroking your hair. "It's absolutely...oh yes... nothing to worry about... You... and your children... that feels so good... will have the best... most nutritious, ohh... drink... in all the worlds..." A low, subtle moo rumbles out of her throat, and her milk takes on a sweeter note, like it's been candied.

That sweetness, you realize, is her orgasmic energy recharging your batteries. It is also affecting your body, making it digest her milk quickly and convert it all into mass, so that you can keep drinking and making her cum without getting full.

When you get big enough that you can look her in the eye evenly without moving your head, she leans in and kisses you deeply, pressing her damp chest into yours, while sliding her hands by your crotch.