lucky for shining, twi doesn’t have her birth control on this time~

@Tirek  
A fair question, and it comes down to legal definition versus an individual couple’s definition. Your wife can be fine with you inviting a third or even going out to a bar for a little strange on the side but by legal definition you’re still committing infidelity, even if the only person who should care is fine with it happening.  
It’s one of those stupid things that just is, like it being illegal to commit sodomy in some states/countries even if no one really should care where you’re putting except for the one you’re putting it to.

@Background Pony #CDAE  
Wouldn’t that also be swinging” or “open relationship”? Most of the time I see the tag “infidelity” only together with “cheating”, that’s why I’m confused^^;

@Brony4Life
 
You missed a few.  
Step 4: Place hand against cheek.  
Step 5: Move hand back, keeping at relative height with cheek.  
Step 6: Strike yourself repeatedly until the urge to complain about needless shit goes away.  
Step 7: Repeat step six if urge returns.

Cadence in the background, though XD

Best Twicest always needs impregnation.

@Background Pony #38F8  
Step 1. Hover mouse over on Incest tag.  
Step 2. Select Hide tag.  
Step 3. Leave.

Egg and sperm cutie marks.
 
Haven’t seen that before.

Cuck Cadence is best

Shining: Happy Mother’s day!
 
Twilight: Huh?
 
Cadence: NANI!?

Judging by Cadance’s reaction, it seems like Shining went off-script by going for impregnation. ‘3’

@Tirek  
depends on definition. infidelity can also mean any sex outside of the marriage.

I don’t think “infidelity” will work here. Since Cadance is filming everything, it is not “sex without the partner’s consent”^^  
but yes, it needs a follow up;-) like a threesome

10/10 need a follow up!

Cadence in the last panel

uh oh