How they first met: They first met when Jasmine was on a trip to Kalos to visit a botany convention. At the time she was studying herbal medicine, so she was interested in learning more about plants there. She was quite overwhelmed by both the crowds and being in a foreign country. Cress was at the same convention to learn more about cooking ingredients (at this point he and his brothers were living in Kalos) and was also feeling a bit overwhelmed by the crowds, so when he saw Jasmine looking lost he suggested they team up so that the event was less intimidating for the both of them. They became quite good friends over that weekend and exchanged numbers when it was over and Jasmine had to return back to Johto.
Where their first date was: A few years after they first met, Jasmine came to further her study of medicine in Kalos for a few months, a decision in no small part influenced by her continued correspondence with Cress. The two, at this point, had had quite a bit of romantic tension in their messages and the last time they had met up when Cress visited Johto. However, this trip to Kalos by Jasmine was their first time going on a proper date. Chili and Cilan both made plans to be out of the apartment for the evening and Cress invited Jasmine over for a home cooked meal. It was very romantic and both had a really good time just talking to each other and enjoying some good food.
When they had their first kiss: They had their first kiss on the first date. Jasmine insisted on helping Cress clean up after the meal and as they did the dishes together, she realized how domestic the whole scene felt and just how right it felt as well. Without really thinking, she shuffled over to Cress and leaned against him, when he leaned back, she stood on her tiptoes and they kissed. 
Who cooks: Cress, obviously, since he’s the professional chef of the couple. He likes to experiment with flavors and techniques and often tries out new recipes on his family, which can lead to hit-or-miss meals sometimes. For the most part though, all his new dishes are well-received and Jasmine and their kids are always excited to see what Cress can come up with.
Who proposed: Cress proposed to Jasmine! The two had been dating for a while and Cress had moved to Johto to live with Jasmine about a year earlier. He felt like his life and hers were in the place where marriage seemed right. He had found a job at a restaurant in Olivine and had plans to open up his own place eventually and Jasmine had started a herbal medicine clinic on the side of being Gym Leader. The proposal was nothing public or showy; Cress made an extra nice meal for him and his girlfriend, then brought out dessert, a small orange sponge cake (Jasmine’s favorite) with ‘Will you marry me?’ written in icing across the top. Jasmine was so touched that she didn’t even want to eat the cake at first and spoil the message. After a bit of happy tears they did end up eating the cake, and to this day eating orange sponge cake makes Jasmine extra happy.
The dominate one: Cress. In public, both he and Jasmine seem quite mild-mannered and quiet, though while that’s fairly close to Jasmine’s true personality, behind closed doors, Cress can be very dominant and bold. Probably thanks to his past as a member of the Shadow Triad, he’s not afraid to take control and Jasmine quite likes that side of her husband, even if admitting so makes her blush.
Their favorite pastime together: One of their favorite family activities for the weekend or holidays is going to the beach. It doesn’t matter what season it is, they’ll go at least once a month. Cress enjoys swimming when the weather permits, otherwise he likes to explore tidepools and the like. Jasmine isn’t as much of a swimmer, but she enjoys relaxing by the water with a good book or watching her husband and kids play in the water. She also likes to walk along the beach and find shells, sea glass, and other pretty things washed up by the waves. She keeps them all in glass jars around the house and sometimes will craft with them. An amusing incident (or incidents as it happened more than once) is the time Cress found a Clauncher in a tidepool, very lost and far from home. Cress wanted to cook it, since Clauncher is a delicacy while Jasmine was horrified he would even think of doing such a thing and insisted they take in to her clinic until they could find a way to get back to its natural habitat. 
Who kissed who first: Jasmine kissed Cress!
Who is the flirt: Cress, though usually not in public. When in private, however, he loves to fluster Jasmine with flirty comments.
Who is the romantic: Both of them are about equally romantic, but in different ways. Cress’ idea of romance is usually food-related, while Jasmine prefers the type of thing found in her favorite romance-novels – rose petals everywhere, candles, hot tubs, etc. 
Who wakes up first: Old habits die hard and Cress is still a very early riser since it was drilled into him during his Plasma days. All the same, he has to get up early for work anyway, so he doesn’t mind all that much. Jasmine prefers to sleep in a little bit, though still gets up pretty early. Of course, their kids did not all inherit that ‘morning person’ trait, so when the triplets are at home Jasmine and Cress try to keep quiet in the mornings so as not to disturb them until it’s time for their wakeup call. 
Who comforts who the most: Jasmine is somewhat prone to anxiety, so Cress does his best to make sure she’s never too nervous about something and helps her calm down if she gets overwhelmed with nerves. However, Cress still has lasting issues from his old life in Team Plasma and before that, which can manifest in nightmares or panic attacks. Whenever he’s upset, Jasmine does her best to make sure he knows he’s safe and that she’s there for him, using the tips she learned specifically to make her husband feel most at ease and comfortable whenever his past comes back to haunt him. The two really do end up comforting each other quite often.
The cuddler: Somewhat related to the above answer, both Cress and Jasmine are quite the cuddlers. They enjoy physical contact with each other and it helps them feel calm. They’re not very publicly affectionate, but they will often hold hands or Jasmine will be on Cress’ arm when they’re out and about. At home, they are often found cuddling – Jasmine especially likes to sit in Cress’ lap so they can hold each other.
The big spoon: Cress is quite a bit taller than Jasmine, so he typically fills this role. Often, Jasmine will also sleep facing him, so that she can hold him as well.