You believe incorrectly...no dog "needs" to be mated. You are putting human concerns onto your dog & they are not appropriate. A simple spay will solve all of your problems. Being in season doesn't make a dog pee around the house. For that, I would have her checked out by the Vet. Call & make a spay appointment by tomorrow. She will need to be examined before she's spayed, so you can ask about the incontinence problem at that time.
Hope I helped.
"Multi BIS (local) GreatGrowkenn Agnes CGC" is ranked #5 (all-breed) in Best Malaysian Bred Dog Of The Year 2010"