I love my boys having each other's back!

My 17 and 15 year old fight constantly but like I said in my other post, always have each other's back. We went to my Nannies house for the weekend and my sister and her kids were there. My sister was always a bully and her kids are even bigger bully's. They cuss at me and bully my kids all the time. It's so fucking awful. Her daughter had a girl there that my 17 yo son knows from his school and he has a crush on her. They talked and stuff and he was obviously flirting. She slept upstairs with the girls, and the boys slept down stairs. My son's slept on the pull out. My oldest has a bedwetting problem. We don't shame him for it and he wears protection but I think that night he leaked. I was outside smoking on the phone with my husband at 2 in the morning. I went inside in the kitchen. I didn't turn in lights and was careful not to wake anyone but I heard my oldest say "Shit!" And my 15 yo say "Are you fucking kidding me?!" 17 yo went ,"It was an accident! God they're gonna give me shit for this!" And my 15 yo said "Chill. Just shower and I'll fix everything. No one will know". I feel proud that I raised boys who have each other's back. During breakfast one of my sister's kids did find the sheets and said in front if the girl my 17 yo liked "Which one of you pissed the bed?" And my 15 yo lied and said "I did" To save his brother the embarrassment in front his crush. Honestly wish me and my sis had that relationship.