DD is 16, she's been with her boyfriend for a couple of months, he's polite and respectful of DD and gets along well with her siblings. DD was friends with him recently and he's trans, he transitioned during the first lockdown with his new name etc and everyone at their school sees him as male and as X as does DD, I call him he and his preferred name when he comes round.
My ex has found out about DD being in a relationship with him and has said I shouldn't allow him to come round and if I do he wants my younger DCs to stay with him as he doesn't want his children around someone like him, I'm going to let her bf stay with DD but not let DCs live with ex.
AIBU?