Adam and Eve had sex with monkeys???

So me, my mom and my aunts we’re having an conversation and the topic ended up on evolution. I am a atheist and they are christian and they we’re saying the usual christian arguments like ‘’if we came from monkeys, why are there still monkeys?’’ and ‘’Look at the world, it’s perfectly made for us!’’, but when I gave them answers, they would straight up ignore it and move on to an different point.

Then out of no where, my aunt said when Adam and Eve was kicked out of the Garden of Eden, they started to have sex with monkeys and that’s how humanity was created...I have heard a lot wacky claims in my life but I have never heard of that lol. I then asked do you have evidence of that claim and she responded that the bible is evidence.

It’s been a week and I’m still thinking about it, how would you even respond to that?