Brum, 30, returned to the apartment later after giving his girlfriend three hours to "cool off", the coroner said, when he found Abi unconscious on January 7 this year.
Portsmouth Coroner's Court, Hants, heard he called Rowland and her husband Rob at around 4am UK time, and she described the "complete shock" of hearing of her daughter's death.
She recalled: "James said Abi is gone. We had a silly row, she went back to the room. She took her own life. She's died.
"He said [the row] was nothing. They did not really row. I did not see them all the time but they had a whole future planned.
"That night she had too much to drink. She had gone back in a huff. I know in her mind she thought he was going to follow her back, find her and they would move on and never have that row again.
"I truly believe Abi did not mean to take her own life. She meant only to frighten him or upset him or make him realise how upset she was in that moment."
The inquest heard Abi was physically and mentally fit and healthy and "never took her life for granted except in that one moment".
Rowland went on: "James and Abi were a loving couple, they were going to get married and have four boys. They had a whole future planned.
"Even though James was a mixed martial arts fighter, he was more like a librarian as a person. He's soft and gentle."
Following the inquest Rowland, from Waterlooville, paid tribute to her daughter's desire to travel the world.
She said: "Abi was a gregarious, fun loving girl with a zest for life. She could be in a moment and take you with her. She was wanderlust, thoughtful and generous.
"She had a wide network of friends and kept in close contact with them. We had a close relationship and she always told me everything.
"I can only come to the conclusion that on that night she had too much to drink, was upset and only meant to make James aware of how upset she was. I truly believe that Abi never meant the outcome to be fatal."
A Thai police report said Abi, who had travelled to India, the Philippines and Australia after giving up her job as a PA in London, was found unconscious in the room wearing a black vest and black trousers.
Coroner Samantha Marsh recorded a verdict of misadventure.
She said: "She had a healthy lifestyle and was physically and mentally fit and healthy. As far as you're aware, she and James' relationship was a loving one.
"In terms of Abi's history, she had never done anything like this before and there were no concerns of mental health issues. Unfortunately it seems like she had a very bright future with everything going for her and James."
She added: "I do not believe she deliberately intended the consequence of what she did.
"I am satisfied there is no third party involvement but I think it went wrong. James did not follow her back from the party like she thought he would have done. He did not come home for three hours, maybe he gave her time to cool off.
"He did not come home unfortunately and for that reason I am satisfied Abi's death was due to misadventure. I am very very sorry for your loss."
Where to get help:
• Lifeline: 0800 543 354 (available 24/7)
• Suicide Crisis Helpline: 0508 828 865 (0508 TAUTOKO) (available 24/7)
• Youthline: 0800 376 633
• Kidsline: 0800 543 754 (available 24/7)
• Whatsup: 0800 942 8787 (1pm to 11pm)
• Depression helpline: 0800 111 757 (available 24/7)
• Rainbow Youth: (09) 376 4155
• Samaritans 0800 726 666
• If it is an emergency and you feel like you or someone else is at risk, call 111.
