A man has sparked controversy online after revealing a jaw-dropping secret: he slept with his girlfriend's grandmother the very first time they met.

The shocking confession came to light when he posted on Reddit under the username @PartyFlamingo4718. The man detailed how the encounter unfolded and admitted to continuing the affair, showing no remorse for his actions.

In his post, the man explained how the incident started. Back in January, his girlfriend had asked him to help her grandmother clean out a storeroom for an upcoming garage sale. Unable to assist herself due to her medical school commitments, she sent him in her place.

"After three hours or so, I completed the task, and the lady invited me to have lunch," he wrote.

During the meal, things took an unexpected turn. He recalled how he couldnt take his eyes off the older womans figure:

"God, she has some big jugs I never saw her before, but right then my eyes were stuck at her boobs, and I didnt even bother to look at her face, he confessed."

To his surprise, the grandmother noticed his wandering gaze but brushed it off with humour.

"She laughed it out, saying, Oh dear, those are not that juicy anymore," he added.

Feeling awkward after the exchange, the man tried to compose himself but admitted to feeling nervous when the grandmother sat beside him. She placed a hand on his lap and leaned closer, her chest brushing against his shoulder.

"I felt super nervous but later I was quite sure about her intentions, so I let it happen," he shared.

From there, things escalated quickly. The pair engaged in a physical encounter on a chair without any protection. Later, the grandmother revealed her desire to keep their relationship going, to which the man eagerly agreed.

Later in the evening, she said that she wanted to keep this thing going, and honestly, I wanted the same too, he confessed.

Shockingly, the man revealed that he has been secretly continuing the affair for nearly a year while still in a two-year relationship with his girlfriend. He expressed no guilt over his actions, stating,

"I'm still b***** her grandma, but I don't regret any of it."

The Reddit post left users stunned, with many expressing their disbelief in the comments.

One user wrote, "No words I don't even know how to respond."

Another remarked, "She must still be hella good-looking."

A third chimed in, "Granny has one foot in the grave and wastes her time securing her spot in hell."