He's an Auror. And a Hugger

who is more likely to support the other in a relationship with someone else “as long as they’re happy”:

“I don’t look like shit do I?” He asked her.

Theseus nodded and grinned. He’s loved being able to take Lally to a few places, and he loved her showing him around too. “I can see why you’re coming this way.”

“It is a wedding, isn’t it? A particularly special and happy wedding I might add,” she answered. “And besides, two people who helped put a stop a critically evil plot should be able to hug one another. And their joy is rather infectious.” She nodded to the happy couple, their laughter and smiles practically glowing.

Theseus squeezed her hand back and smiled softly. He tried to hide a chuckle at the point about the icing and turned to look towards Lally. “At least now we get a proper slice.”

Lally chuckled, placing her arms over his as she leaned back into him. “Well, that’s rather sweet, Theseus, but you have the wrong idea,” she informed him. She turned to look up at him. “He’s my collegue. And he was wondering If I could convince your brother to come speak to his class about his book.”

Theseus smirked against her skin and ran and started unbuttoning her blouse with quick fingers. “It’s just like unwrapping a present. Feels like my birthday and Christmas has all come at once.”

Lally had decided to take the extra week from school off to go surprise Theseus. Since she'd had to go to the Ministry anyway, she made her way quickly to his office where she'd found him leaned over grabbing something. "You know, you might not have much of an ass," she started. "But I do love it, and enjoy grabbing it." She moved closer and reached out, waiting for his permission.

FANTASTIC BEASTS AND WHERE TO FIND THEM: THE SECRETS OF DUMBLEDORE (2022)

The Scamander Brothers

Lally chuckled, placing her arms over his as she leaned back into him. "Well, that's rather sweet, Theseus, but you have the wrong idea," she informed him. She turned to look up at him. "He's my collegue. And he was wondering If I could convince your brother to come speak to his class about his book."

Theseus let his hands wander upwards, feeling the softness of her skin. He moved his lips to kiss down her neck again, wanting to get a little bit teasing with her as well. 

“I don’t look like shit do I?” He asked her.

Theseus nodded and grinned at her. “You always do have the best opinions of where to go. I don’t think there’s been a place yet that I haven’t enjoyed with you.”

“It is a wedding, isn’t it? A particularly special and happy wedding I might add,” she answered. “And besides, two people who helped put a stop a critically evil plot should be able to hug one another. And their joy is rather infectious.” She nodded to the happy couple, their laughter and smiles practically glowing.

Theseus smirked slightly and stood beside Lally, as he watched the couple with the cake. He couldn’t help but, grin. Even with the slight twinge of sadness of how he never got to have this with Leta, he still thought that they were a rather infectious with their joy kind of couple.

“It is a wedding, isn’t it? A particularly special and happy wedding I might add,” she answered. “And besides, two people who helped put a stop a critically evil plot should be able to hug one another. And their joy is rather infectious.” She nodded to the happy couple, their laughter and smiles practically glowing.

Theseus grinned at her. “I enjoyed it too.” He told her as he looked over when Queenie and Jacob had started heading over to cut the cake. “Not a word about the icing.” He whispered. “If anyone we blame it on Newt’s creatures.”

“I don’t look like shit do I?” He asked her.

Theseus nodded and smiled at her softly. He squeezed her hand gently as they walked along. He took a bit of the pastry as well and grinned. “This is amazing as ever.”

Lally chuckled, placing her arms over his as she leaned back into him. "Well, that's rather sweet, Theseus, but you have the wrong idea," she informed him. She turned to look up at him. "He's my collegue. And he was wondering If I could convince your brother to come speak to his class about his book."

Theseus grinned at her. He let his hands move underneath her blouse as he kissed her deeply. He knew that they had a kind of dynamic that meant neither of them was more dominant than the other. Which he liked. 

“It is a wedding, isn’t it? A particularly special and happy wedding I might add,” she answered. “And besides, two people who helped put a stop a critically evil plot should be able to hug one another. And their joy is rather infectious.” She nodded to the happy couple, their laughter and smiles practically glowing.

Theseus grinned. “That sounds excellent. I can definitely afford a dinner. And you get to choose where we go too.”

Lally chuckled, placing her arms over his as she leaned back into him. "Well, that's rather sweet, Theseus, but you have the wrong idea," she informed him. She turned to look up at him. "He's my collegue. And he was wondering If I could convince your brother to come speak to his class about his book."

Theseus smiled at her, and shook his head. “You’re a minx Professor Hicks.” He whispered and kissed her again deeply. He knew that he would get a little sexually frustrated at times.