A united front against Sentinel is the best thing to ever happen to the Constructicon/Prowl dynamic especially since both had time apart post their break up. Him calling them help repair the moon and then letting them put Sentinel to work was an olive branch.
Now he finds this strangely sexy and is having to seduce his boyfriends back. Thankfully, they find his shitty attempts at dadding and plotting also incredibly sexy. Petty, in their opinion, is a great look on Prowl, and his decision Sentinel has to work for his Energon had whole layers of him being in charge and letting them beat up a Prime.
Getaway meanwhile has opinions on the Constructicons who are startled by Prowl's soft (for him) attitude towards him and treat him accordingly.
Fortress Maximus is still working on his recovery which includes building bridges and realizing Prowl is a sadsack and Getaway is three seconds away from a breakdown, his natural niceness takes over and despite Prowl being an asshat the Moon Husbands slowly warm up to him and Fortress Maximus actually offers him friendly relationship advice.
Sentinel is exhausted and determined, and while doing construction, puts him near the titans he is interested in raising. Sentinel can be patient and mentally curses the Constructicons during the day. Unfortunately, being away from the LL has not managed to stop his regard, and he finds himself still attracted to Getaway. Especially since they now have a new shared dislike of the Constructicons and agreement, they are bad for Prowl.
He decides, logically, the only way to overcome this is to convince Getaway to Conjunx him so there is little risk to betrayal and they will have to do a full old fashioned Spark bond where they die together to make sure they cooperate. This proposal does not go as planned as it is very Mr. Darcy First Proposal because Sentinel views himself as hot shit and mentions he has struggled against these feelings and all rational thought says Getaway is terrible.
Getaway reacts accordingly, and Sentinel is now sleeping outside in alt mode because Getaway hacked the system and Red Alert keeps "forgetting" to let him in or "losing" his com call.
Sentinel in desperation, Prowl was not sympathetic to his blight goes to Fortress Maximus and asks advice saying since he is "one of those" and managed to find two partners and is a Maximus, respected family, surely he can offer some worthy advice. Fort Max embarrassedly admitting he and the moon husbands are not Conjunxed yet makes Sentinel deeply judgemental.
And leaves him, clenching teeth, with the realization he will have to, though he hates it, ask the only other group around. The Constructicons. Getaway is too valuable to lose with limited resources as they are.
Code for he has Feelings and Hates them. Sentinel’s mentor/Prime would be deeply ashamed of him.
Sentinel was such an asshat dickbag he got the constructicons their Prowl back
YEPPP Getaway meet your stepdads, now they're gonna care about you damn it
Ah yes marriage time, plan A
Sdhhf. One of the few smart decisions Getaway has made, and Red is backing him up on that lmao
Oh Sent you 💖pathetic loser💖
Sentinel babygirl you are also "one of those"
Ah yes, the last option. The green harem
Yep yep, he's got the feels and he's been taught his entire damn life the feels are Bad™️