I guess her thought-out-plan is blackmailing her mother.
Judging by the picture, whenever his mom calls he's seized with panic and is shown desperately trying to remember whether he forgot her birthday (again).
When his dad calls, he puts on his Serious Man-Face and gets ready to field Serious Questions about his future and whether he's started saving up for a house yet.
Drunk texts are a little hard for some to decipher, so here's a handy guide to help you follow the conversation:
E u b inG gopod? (Are you being good?)
Il$m goods I'm a liL drinmkl (I have spent one million dollars on various goods, my current Halloween costume looks a little like a Drin-brand racing vehicle, mk. 1.)
1111 male a qisH (I am about to order a quiche stuffed with men.)
Im$ havi FUM (I have spent one million dollars for the privilege of eating chum, which is fum fum, as the hit children's animated television series Spongebob Squarepants has taught me.)
Ur hcing fum 222000 (Do you, too, want some chum? We can also involve ourselves in recreational drug use, a suggestion I am communicating by secret code:
222000 ---> [2 + 2]  [0 + 0 + 0] --->    ---> 420 )