get in deeper
1. To become increasingly involved in a particular situation. You say you don't want do business with them anymore, but here you are, ready to sign a new contract and get in deeper.
2. To worsen a particular situation. You've already insulted her, just shut your mouth before you get in deeper.
caught up in something
and caught up with somethingdeeply involved with something; participating actively or closely in something. Wallace is caught up in his work and has little time for his son, Buxton.
get in deeper
Fig. to get in more and more trouble; to get more deeply involved with someone or something. Every time he opened his mouth to complain, he just got in deeper.