A couple of checks in the various services offered by the Family require a sim to be on their home lot. Unfortunately, this required a new check to be added to the interactions in order for them to show up on tiny home lots, as well as just normal residential lots. Thanks to Schram92 and Lumi Buttons for pointing this out and helping me corroborate the cause.

The biggest addition of v1.4.0 was the Extended Family; Aunt Mai, Uncle Rick, and Cousin Jack. There's some interesting info, as well as a little more canon, to be found in the information post on my website, but the basics are covered in the change log below.

v1.4.2

• Added additional check for Tiny Homes
  Sims on Tiny Home lots will now be able to access all the family's services.
• Corrected some coding errors
  Cleaned up small tuning errors which did not break the mod but might have caused poor performance.

v1.4.1

• Implemented new checks for Care-Givers
  Alpha care-givers will no longer cause “Scary Alpha” buffs in the children who they care for, but are not directly related to.
  Extra flirty heat or rut buffs can longer be triggered by care-giver Alphas/ Omegas.
• Corrected the Rut Preventor label string
  The notification will now explain the Rut Preventor, rather than one of Aunt Mai’s products.

v1.4.0

• Introduced Aunt Mai's Emporium and Uncle Rick's Store
  Aunt Mai's Emporium sells various Omega supplements.
  Uncle Rick's Store sells various Alpha supplements.
  Both are found under the new Omegaverse category on the PC.
• Introduced Alpha and Omega supplements
  Alpha supplements include: Rut Suppressant, Rut Inducer, Alpha Contraceptive, and Rut Preventor.
  Omega supplements include: Heat Suppressant, Heat Inducer, and Heat Contraceptive.
  A Supplement Sickness Remedy is available for both Alphas and Omegas from both Aunt Mai's Emporium and Uncle Rick's Store.
  All supplements have a "Read the Label" interaction, which states how to take them and their effectiveness.
• Introduced Cousin Jack's Market
  Cousin Jack's Market sells poorer quality versions of the Alpha and Omega supplements.
  Poorer quality supplements have reduced effectivenesses, shorter effect durations, and can lead to Supplement Sickness, which can lead to death.
  Discovered by successfully Researching Supplements on the PC, then found under the Omegaverse category on the PC.
  Cousin Jack's Market is only available for a limited amount of time, before being "burnt".
• Introduced Aunt Mai's Clinic
  Aunt Mai's Clinic offers various treatments for Omegas, including; Heat Pausation surgery, and Fertility Reduction surgery.
  The Clinic also offers emergency treatment to those suffering from Supplement Sickness, preventing death and speeding up recovery.
  Found under the Omegaverse category on the PC.
• Introduced heat and rut customisation settings
  Omegas can vary heat cycle duration between 3 and 10 days, and the chance of heat at the end of each cycle between 30% and 100%.
  Alphas can vary rut cycle duration between 4 and 15 days.
  Settings are found under the Omegaverse category on Sims with Alpha or Omega traits. Settings are per sim, not global.
• Increased the default chance of heat
  Increased to 65% from 50% at the end of each heat cycle.
• Introduced new whims
  Omegas will receive romance and family related whims.
  Alphas will receive athletic related whims.
  Alphas and Omegas in heat/ rut will receive further romance related whims.
• Introduced Beta reactions to Alpha and Omegas
  Young children will become scared of unfamiliar Alphas.
  Betas will notice when Alphas or Omegas nearby are in heat/ rut.
• Implemented some new checks with proximity heat/ rut buffs
  Buffs resulting from being near an Alpha or Omega from a stage of heat or rut will be cleared properly when advancing to the next stage.

Further Information

• Supplements
  All supplements are for use on Alphas or Omegas. Only sims of the correct type are able to use the "Take Supplement" interactions.
  When taken under the wrong circumstances, supplements can lead to uncomfortable side effects.
  All supplements have a chance of failure, where they do not function. This may not always be immediately obvious when they fail (as with real world medicine).
  All supplements have a "Read the Label" interaction, which will prompt a notification explaining how to correctly take the supplement, and its chance of failure.
• Cousin Jack
  Cousin Jack's Market is only available to people who have successfully Researched Supplements on the PC.
  As time goes on after finding Cousin Jack's Market, the chance of being "burnt" and the Market no longer being available increases.
  Cousin Jack's stock changes periodically, only 4 of the 7 possible "dodgy" supplements will be available at any given time.
  Find more information on Jack in the Extended Family article.
• Supplement Sickness
  Supplement Sickness is caused by taking "dodgy" supplements, and is unaffected by whether or not the supplement is successful (even failed supplements can cause sickness).
  Sims will feel uncomfortable whilst suffering from supplement sickness. In extreme cases, supplement sickness can lead to a sim's death (approx. 2% of cases).
  Sims can purchase Supplement Sickness Remedies, which can help a sim get better faster and reduce the chance of the sickness progressing. Sims can also go to Aunt Mai's Clinic and receive emergency care, which will eliminate the chance of death, and speed up recovery.
• Settings
  Settings available for Alphas and Omegas are "per sim" and only apply to that sim, and are not global.
  Omegas and Alphas who do not have any changed settings will default to the 5d/65% heat cycle and 8-10d rut cycle.

Updates

20-02-05: Ok, so remember how v1.4.2 was a fix, then v1.4.2a was a fix of a fix. Well, this is the fix of the fix of the fix.
20-02-04: Actually fixed the issue this time. I miscoded something, which needed to be corrected.