Days of Our Lives (DOOL) spoilers for Monday, July 22, reveal that Xander Cook (Paul Telfer) will reel now that his mother has shown up as a last-minute wedding guest. Fiona Cook (Serena Scott Thomas) arrived in time to watch Xander and Sarah Horton (Linsey Godfrey) tie the knot, but that means trouble is brewing, too.

Theresa Donovan (Emily O’Brien) managed to tie the knot with Alex Kiriakis (Robert Scott Wilson), but an annulment is surely in their future.

Days spoilers say Alex’s life is about to get turned upside down again, and Fiona will inevitably be the reason why.

DOOL fans know Justin Kiriakis (Wally Kurth) has been carrying around the letter that was included in Victor Kiriakis’ (John Aniston) will – the one that was supposedly written by Anjelica Deveraux (Judith Chapman) about Alex’s paternity.

Fiona wrote that letter about Xander instead, so she’ll have the opportunity to clarify that.

Days spoilers say Theresa’s world will spin out thanks to Fiona’s arrival, so her marriage is about to fall apart just as quickly as it began.

All Theresa’s scheming will blow up in her face, so she’ll have to face consequences for scamming Alex into thinking he was Victor’s son and cheating Xander out of his inheritance.

Andrew Donovan (Colton Little) might turn on Theresa as well since she obviously hasn’t kept her promise to stay on the straight and narrow.

Will Andrew tell Xander and Sarah that Theresa was Konstantin Meleounis’ (John Kapelos) kidnapping accomplice?

Regardless, Days spoilers say Theresa will pay the price for her deception while Alex and Xander realize they’ve been duped!

Fiona will offer updates on the real paternity news at some point, so the rest of the puzzle pieces will click into place from there.

Over with Brady Black (Eric Martsolf), he may land at the bar instead of the AA meeting he claimed he was headed to.

Brady is having a tough time dealing with Theresa’s marriage to Alex, so he just bolted from the ceremony.