Is this sentence correct Jen and Mom grab their bikes and helmets?

Answer:
Yes, it is a correct sentence. However, the word 'mom' is a common noun and doesn't require capitalization.

Compound subject: Jen and mom
Verb: grab
Compound direct objects: bikes and helmets
Adjective: their
First answer by Notyouraveragedummy. Last edit by Notyouraveragedummy. Contributor trust: 391 [recommend contributor recommended]. Question popularity: 1 [recommend question].