DP and his XW have two children, DS1(6) and DS2(3). They also have a very laid out parenting agreement registered with the court, and 50/50 shared custody (not the U.K.).
DP just arrived at XW's house to pick up his DC and they weren't there, so he rang her. She didn't answer. Text back a few minutes later to say they were at the local playground and could he meet them there. Completely against our country's current covid-19 regulations. He rang me and I suggested he keep a cool head about this, and she often blows up over minor things and we're all stressed enough at the moment without her constant barrage of texts after they have a parenting disagreement.
DP arrives at the park to find her with the kids, plus her two friends and their kids. All clamoring on the play equipment, no social distancing in effect. He bit his tongue, collected the boys to take to his car. When he picked up DS2, he noticed he was warm. He asked XW why he's warm and she said he's come down with something. DP left the park with the kids and came home incensed. Text XW asking why the kids are out at the park, especially when DS2 has a fever today. She text back: "DS2 has had a fever for three days now, he was bored and irritable, I can't keep the kids locked up forever. It's bad for their mental wellbeing."
We're horrified. She has a huge back garden for the boys and the weather here has been nice. Now she's taken DS out sick to play with three other kids and his brother touching who knows what.
My AIBU - DP thinks this gives us justification to keep both boys for an entire week until symptoms are gone, and potentially a week longer now that DS1, DP, and myself have been exposed. Their parenting agreement is really clear and covers sickness, stating the kids must go back to the other parent's house even if they're sick, unless they have a doctor's note. Obviously right now that's not possible. XW is likely to take DP to court over breaching this agreement. They're due to go back to their mum's in two days.
Would we be unreasonable to keep the kids the two week waiting period in this scenario?