Promo texts get sent according to an algorithm. Did you block promotional texts from koodo previously? 

If there a promo she was offered that you are interested in? 

Hi, thanks for your help. No I haven’t block anything, I’m getting texts about my bills but not offers. No I’m not particularly interested in any of the offers she’s getting but as the owner of the account I think I should be getting offers as well.

As your wife is using a number of your account. Koodo doesn’t know which number is your or hers. They assumed  3 numbers are all yours.

Anyway, which offer was it? Promotional offer was generated based on certain criteria by Koodo automated system. It is not uncommon to see one number on the same account had but the other didn’t. If you want, you could try to contact Koodo directly and ask a rep to look into it. They might be able to offer you the same offer.

Thank you for clearing that up, appreciate it.