>>150435575
She doesn't need to to "turn yandere" because she already "owns" him. She's the only sister who can push Lincoln around and he'll still, not always, but frequently enough bend to her whims. All it takes is a little too long hug with deep inhales, maybe a sweaty shirt or pair of shorts for him to "clean" and he is under her thumb. Lynn doesn't even think it's sexual or intimate, he simply loves her smell and for whatever reason is embarrassed by that fact. His girlfriend is ruining things. Suddenly he has other scents, tastes on his tongue that Lynn can't provide because of the implications of her willing to do it.
>>150435627
>Leni
It would be too obvious, plus he likes someone he can bounce off of not a girl he has to lead by the nose to enjoy dates.
>Luan
Too extreme. A girl like Luan would give him PTSD flashbacks of his prankster sister's worst moments.
>Lucy
Too much paranoia. Any girl like Lucy would stalk him relentlessly and escalate things too fast.
>Luna
Lesbian. Imagine waking up every day in the back of your head is the high possibility your girlfriend will dump you to "experiment" with other girls or flat out fall in love with a girl behind your back.