Does your “friend” bet on same matches as yours but on opposite side? Because there’s no problem if you both on same matches on same exact pick. But if you’re always have a contradicting bet then this will surely raise a suspicion for arbitrage betting which is not allowed in the casino because you can freely get rakeback and other passive reward such as airdrop and lvl up reward without losing anything.

But at least you should recover your initial deposit unless the other account successfully manage to withdraw the balance which cover your initial deposit. This story of yours about multiple account that involves family, friends and other relatives is the common reason of those players caught doin arbitrage bet and different kind of abuse.