Patty Hearst felt it toward Cujo, one of her Symbionese Liberation Army captors. And the feelings were often reciprocated from hostage holder to hostage. Those authorities delayed the negotiations, wouldn't take them seriously, and might storm the sanctuary and kill them all. Within the siege room traumatic bonding had occurred. So in the case of the Stockholm Syndrome a normal adult may experience ironic attachment to an abuser through the sequence of terror, isolation, infantilization, denial, gratitude and attachment.
Love is felt by some.
A battered wife might love for similar reasons. Or, the battered wife might love her spouse because relief from punishment is so rewarding that she has learned to savor this feeling while denying the pain of physical abuse. Or, she might love qualities that are lovable and suppress any outrage in response to behaviors that are cruel. Love is notoriously irrational, complex and paradoxical. To regard all love in abusive relationships as a product of abuse is unhelpful and untrue.