Name changed for obvious reasons.
ExH told me this week he might move in a lodger soon. He told the DC the person's name and several details, eg they'll bring some pets with them. He's already asked permission from the letting agent. So all a lot more nailed down than he made me think. ExH is renting, so it's unlikely to be a lodger arrangement - more likely to both be tenants.
Potential housemate is an activist, and some of what exH told the DC about this person's views has already been parroted back to me by DC. This particular kind of activism (belligerent online personality, threats against anyone who disagrees etc) is not something I want around my DC. ExH is armchair/online activist-adjacent. Before we left, he devoted his time to building his online presence (unbeknownst to me - I happened upon his huge follower count months later), separating himself from all of us in the same house. He sometimes didn't see the DC for an entire week despite living in the same house. We are still scarred by his erratic behaviour during this time.
ExH met the potential housemate on the internet, as far as I know. Person is unemployed, as far as I can work out, so no DBS. No idea where money for rent will come from.
ExH is struggling for money (he spent thousands on, essentially, toys in the past year - tv, PS5, lots of others). He has a very good salary, but, I assume, lots of debt to repay. He pays maintenance, but not very regularly because he's often short of money before payday. He has a very good job. I've been flexible and accommodating about this to keep the peace.
DC see him several times a week but don't sleep over. They've had a rocky relationship because exH is unable to consider anyone's needs except his own. Younger DC's school raised safeguarding concerns about his behaviour towards DC a few months ago.
ExH was emotionally abusive to me before I left with DC (I had help from domestic violence charity) and continues to be emotionally abusive to the DC (gaslighting).
AIBU to say DC can't go to exH's house and he'll have to see them elsewhere?
(Also, this might be unpopular on MN, but I have a real dislike of pets for germophobe reasons and don't want DC to be around this person's pets as I'll have to deal with hair, smell etc.)