They aren't even friends, but Melanie's (Molly Burnett) concerns over Theresa's (Jen Lilley) mental state and well-being have propelled her to look into some potentially shady characters that have been keeping an eye on Brady's (Eric Martsolf) former flame on Days of Our Lives.

Melanie Makes Nicole An Irresistible Offer

After she overheard Clint (Lucas Kerr) talking to Dr. Mandrake on the phone and assuring him Theresa didn't remember anything, Melanie became curious as to what was happening, and started looking into the mysterious doctor. And though she hasn't found anything solid yet, she has found some incriminating info which hints he could have some shady business dealings.

However, her investigation could come to a crashing halt when Theresa gets wind that she has been looking into the man, whom Theresa tried getting in contact with when she wanted to get back the money Clint owed her after their break-up. Theresa will confront Melanie about her investigation and demand answers about why she is digging into her life-and will order her to stop.

Melanie Begins Investigating Mandrake

What neither woman knows however is just how dangerous Mandrake is, or what he actually did to Theresa-and by default, Brady. Back when Kristen (Eileen Davidson) was still in Salem, she had heard Theresa was pregnant with Brady's baby-news which made her livid. Because she wanted to be the one who was carrying Brady's child, she hired Mandrake to have Theresa kidnapped, and the embryo inside her was then removed and implanted into Kristen.

After the procedure, Theresa no longer remembered anything, and no one believed she had actually been pregnant after blood tests at the hospital turned up negative-and she was accused of trying to falsely trap Brady. Since then, she has found herself also haunted by anything that reminds her of babies and being pregnant.

And though she is now insistent that Mel butt out of her life, she has no idea that the investigation could wind up giving her the answers she needs to finally resolve all of her mixed emotions.

Days of Our Lives airs Monday-Friday at 1:00 p.m. on NBC.