There's a lot to unpack here. First, and this is just us, we wouldn't want to suck on anything that's been inside our sister. Love her dearly but this just isn't something we'd do. Also, our sister has hands. She would have put the paws on him and us.
So this guy is claiming that his sister asked him if her baby daddy was gay, and then sent him a video of him and the baby daddy together.
We don't know if this is one of those "mis leading title" posts or not because we can't imagine anyone seeing this, and just walking away.
Some of his followers also had questions but he says the video and the situation is legit. See the screenshots below and click the link to see the video.
Does it seem real to you?