Seeing Millie naked

The door to the ensuite bath room is part open, so I can see a part reflection of Millie in the mirror, but it is too fogged up from her showering for me to see her body, but I can tell that she is drying herself.

Then, after what seems like an eternity, she comes out of the bathroom wrapped in a towel. She walks over to her make-up table, sits down, takes of her shower cap, and searches around amongst the many items on the table. Then she picks up a big tub of body lotion, squirts some in her hands, shifts position on her seat, and leans forward and starts to apply lotion to her legs.

My cock is now so hard that I can feel it straining against my shorts, so I begin to rub it through the material, and then realise I am still holding Millie's lilac bra in my hand. I unzip my fly with my other hand, take my dick out, and start to slowly masturbate using Millie's bra.

Inside, Millie has finished putting lotion on her legs, and has moved on to her arms. The towel has come off a bit, and it looks like it will fall any second now, and I start to stroke myself faster as I watch Millie putting lotion on herself.

Millie has now finished her arms, so she takes the towel off, and starts putting lotion on her stomach. I am now seeing her naked, and start to jerk myself even more intensively, then Millie starts to apply lotion to her big tits. She puts a lot of lotion on one hand, smears it out in the valley between her big tits, then uses both hands to rub the lotion into her big tits, her hands moving slowly and deliberately. I am imagining that the white lotion she is rubbing on her big tits is my cum, and that thought pushes me over the edge, and I cum into Millie's bra, struggling to keep quiet.

My timing here is perfect, since Millie has finished with the lotion and goes back into the ensuite bathroom, so I look at her cum covered bra, smear it out as best I can, hang it back on the windowsill where I found it and then quietly sneak back in the house.