attraction triggering on adopted family member

a really gross (hopefully) bug ive been getting recently is once my sims kids age up into adults attraction/romance starts working for them?? it obviously doesn't work for the biological kids/parents, but since the kids my sims adopted as a care dependent aged into young adults now they can have a romance?? this is a lil confusing but ill break it down, i have three sims in a polycule and they have two kids sims 1 and 2 had a science baby and sims 1 and 3 had a biological baby, all three sims worked together to raise both kids. (i have parenthood and had them adopted as care dependents or wtv so they did register as parents) and now the kids are young adults and despite having the kids having "happy childhood" and "mommy dearest" relationships respectively (and the "adoptive" parents having their respective sides of them) they can still flirt with eachother and trigger attraction?? this is SO gross and makes me rly uncomfortable, i hope this gets patched but until then does anyone know a way to avoid any potential autonomous flirting :/ (i play on xbox so no it isn't mods)