Should I tell my mom I have humped our dog?

There are so many layers to this question. If you injured the dog, your mom needs to know the dog is hurt.

If this is something you have the urge to do again, you do need to talk to someone. Beyond the fact that bestiality (zoophilia) is considered to be animal abuse, it means you are acting out on urges and fantasies that should be controlled. Where it is normal to have curiOSities about some sexual acts, thinking on them too much or even acting out can escalate into some dangerous behaviors, including rape (some may consider what you did to the dog as rape). If you are showing early signs, you need to talk to a professional. They can help you find healthier outlets or redirect sexual urges.