Her tight yoga pants enveloping her entire lower half from her waist, finishing down near her ankles. At her backside instead of regular buttocks she has two rather large breasts in its place. They are in fact larger than the breasts on her chest, which are of relatively unremarkable size. 

She has lowered the waist of her pants to reveal the butt cleavage. Vera normally conceals the fact that her buttocks are actually another set of mammaries with either baggier pants (like track suits) or tight pants (like jeans; which make it looks like she just has a large butt).

Suddenly she could feel the nipples become sensitive, she didn't want to sit down so she stripped off her yoga pants. Underneath the pants reveals that she a wearing a special hybrid of underwear, it looks like normal underpants from the front but at the back it is a brassiere which hold her unique second set of breasts that are situated on her ass.

Stripped off into her special 'bra-panties', the breasts on her behind are nearly exposed with the nipples hard and protruding through the bra. It has become chilly so she turned on the radiator.

She stood down on her knees with the breasts resting on the heels of her feet. She grabs her breasts with her hands and then smooshes them together and squeezed the sensitive nipples. She keeps squeezing them, occasionally pulling them outwards, giving her an amazing sensation. There are stains coming through the nipple on each side of her underwear, she was lactating.

Vera strips off the last piece of underwear covering her lower half, exposing the bare breasts on her ass, nipples still hard and sticking out. She plays around with the breasts, mostly rubbing her fingers on and around the nipples. With her backside facing the mirror she squeezes them together then spreads them breasts apart. Exposing her butt-hole that was concealed between the breasts to the mirror.

The urge the fondle the breasts on her ass came back in a rush. She cam closer to the mirror, still with her backside facing it. She squeezed the nipples harder and faster this time as it began lactating again. She could feel the sensation in the breasts as milk was spraying all over the mirror. She kept squeezing the milk out then let go of her breast as she shook her ass up and down, letting the last drops everywhere and covering the mirror in drops of breast milk. 

The jiggling became more and more wild then the milk stopped and she stopped shaking. She grabbed a towel and wrapped it around her waist, the breasts on her behind made a noticeable bump through the towel. Walking off the to bathroom, she decided she was finished and started to clean up.