Who cooks: Neither of them do, really, it's Steak's (Grez's) job to do that. But when he isn't doing that and Parva wants it to be special she'll be the one to whip him up something. There have been instances where he's tried and nearly burned down the kitchen, however.
Who does the laundry and other chores: Parvati usually takes care of domestics with the help of servants and guards. There are usually hired help most of the time, so most of her work goes into caring for the young and participating in talks and other political activities with Wrex.
How many children do they have: Currently they only have three children together; Eros, Shivali and Nirav. More are on the way, if Wrex has anything to say about it.
Who’s more dominate: Wrex. Definitely Wrex.
Favorite nonsexual activity: The two of them like spending leisurely time together; eating, sitting around outside watching the stars, betting on varren fights and even going out to ride the Kalki's.
Their favorite place to be together: It doesn't necessarily matter where they are, just as long as they're in the company of one another. Wrex would argue the bedroom, but his opinions don't matter right now.
Any traditions: Besides the traditional krogan things? Not necessarily; Wrex has made it a habit of teaching his male children horrible habits; farting, belching, handling weapons and planning to head out onto hunts. He's fairly excited about the idea of handing off the family armor to one of his worthy children.
Their “song”: Hear My Name
What they do for each other on holidays: Well, krogan holidays aren't necesarily as giving as other alien holidays. They mostly consist of fertility rituals/parties and the gathering of gathers to spread stories, trophys and alliances to strengthen bonds. And usually these two are giving to all clans and members, and when they do come together, it just ends in really romantic sex.
Where did they go for their honeymoon: Wrex took her to the Citadel at first, where they spent most of their time in the Presidium. He also had to fight his new wife from trying to 'find fish' in the large 'lake'. This led to their first swim, as Parvati threw him in and then she threw herself in. It made headline news and both have to have C-Sec escort when visiting the gardens and lake.
Where did they first meet: Tuchanka inbetween Khel and Jorgal territory. Parvati was leading an armed force across the desert back to her people and Wrex's intercepted hers -- he had done this because multiple attempts to have an audience with her had failed and he decided to use male means to get her attention. He got it alright.
What do they fight over: Wrex and Parva don't really fight over much of anything. But they do bicker, and it usually has to do with how manipulative Parva can be towards him. Most of the time its her attempts at soothing his 'ego'.
Do they go on vacations, if so where: There is no vacation for the krogan, at least not yet. These two are by far too important to take time off of their busy schedules to part away from Tuchanka -- even for a little while. [Thank you for asking me about my otp; Warvati pairing. I hope you enjoyed it <3 ]