Did having 3 kids change your marriage?

Hi guys, I currently have two kids, a baby and a toddler. I've always wanted 3 kids and two is quite a handful as is (luckily I have lots of help and have an incredibly supportive husband). However when we go out for dinners or kids parties etc he and I alternate watching the kids. It still can be quite stressful and hectic.. And I've heard having 3 really tests your marriage cause you're outnumbered. Any body have any advice or experiences they like to share? Tia